研究者総覧

永廣 秀子NAGAHIRO Hidekoナガヒロ ヒデコ

  • 研究院自然科学系物理学領域 准教授
Last Updated :2020/07/16

researchmap

学位

  • 理学博士, 奈良女子大学

研究キーワード

  • ハドロン物理学(理論)・中間子原子核 

研究分野

  • 自然科学一般, 素粒子、原子核、宇宙線、宇宙物理にする理論

経歴

  • 2006年04月 - 2008年10月 大阪大学核物理研究センター 学振特別研究員
  • 2008年10月 奈良女子大学助教
  • 2005年04月 - 2006年03月 大阪大学核物理研究センター 特任研究員

学歴

  • 1998年04月- 2001年03月 奈良女子大学 人間文化研究科

論文

  • Three-body decay of Λ?c(2595) and Λ?c(2625) with the inclusion of a direct two-pion coupling

    永廣秀子

    2018年12月, 98, 114007, 英語

    [査読あり]

  • Constraining the optical potential in the search for η-mesic 4He

    永廣秀子

    2018年07月, 782, 6-12, 英語

    [査読あり]

  • Multistrange Meson-Baryon Dynamics and Resonance Generation

    永廣秀子

    2018年03月, 59, 29, 英語

    [査読あり]

  • Missing-mass spectroscopy of the 12C(p,d) reaction near the η′-meson production threshold

    永廣秀子

    2018年, 97 (1), 015202, 英語

    [査読あり]

    研究論文(学術雑誌)

  • η-nucleus interaction from the d+d reaction around the η production threshold

    永廣秀子

    2017年10月, 53 (10), 194, 英語

    [査読あり]

    研究論文(学術雑誌)

  • Three-Body Decay of Λ?c(2595) and Λ?c(2625) with consideration of Σc(2455)π and Σ?c(2520)π in intermediate States

    永廣秀子

    2017年06月, 95 (11), 英語

    [査読あり]

    研究論文(学術雑誌)

  • Effect of the final state interaction of eta’N on the eta’ photoproduction off nucleon

    永廣秀子

    2017年04月, 95 (4), 045206, 英語

    [査読あり]

    研究論文(学術雑誌)

  • First Results on the Experimental Search for η′-Mesic Nuclei with the 12C(p,d) Reaction

    永廣秀子

    2017年, 48 (10), 1813-1818, 英語

    [査読あり]

    研究論文(学術雑誌)

  • Formation of Possible eta'(958)-Nucleus Bound States and eta'N Interaction

    永廣秀子

    2016年11月, 13, 010010, 英語

    [査読あり]

  • Production and decay of charmed baryons

    Atsushi Hosaka, Emiko Hiyama, Sang Ho Kim, Hyun Chul Kim, Hideko Nagahiro, Hiroyuki Noumi, Makoto Oka, Kotaro Shirotori, Tetsuya Yoshida, Shigehiro Yasui

    © 2016 Elsevier B.V. In this paper, we discuss reactions involving charmed baryons to explore their unique features. A well known phenomenon, the separation of the two internal motions of the ρ and λ types of a three-quark system is revisited. First we discuss the mass spectrum of low lying excitations as function of the heavy quark mass, smoothly connecting the SU(3) and heavy quark limits. The properties of these modes can be tested in the production and decay reactions of the baryons. For production, we consider a one step process which excites dominantly λ modes. We find abundant production rates for some of the excited states. For decay, we study a pion emission process which provides a clean tool to test the structure of heavy quark systems due to the well controlled low energy dynamics of pions and quarks. Both production and decay of charmed baryons are issues for future experiments at J-PARC., 2016年10月, Nuclear Physics A, 954, 341 - 351, 英語

    [査読あり]

    研究論文(学術雑誌)

  • Excitation Spectra of Carbon Nuclei near eta' Emission Threshold

    永廣秀子

    2016年10月, 13, 020030, 英語

    [査読あり]

  • Structure of charmed baryons studied by pionic decays

    永廣秀子

    2016年09月, 95, 014023, 英語

    [査読あり]

  • Decays of doubly charmed meson molecules

    R. Molina, H. Nagahiro, A. Hosaka

    If the X(3872), Y(3940) and X(4160) are D*(D) over bar + c.c., D*(D) over bar (S) and D-S*(D) over bar (S)* molecules, respectively, there should be doubly charmed mesons (D-(*D-)(()*())). In this talk we predict two states with J(P) = 1(+) in the charm = 2 sector, one DD* state around 3850 MeV, other D*D* state with mass around 3970 MeV, and other two similar states in the (charm = 2; strangeness = 1) sector. Besides that, we evaluate the decay widths of doubly charm mesons D*D*(1(+)), into DD pi and DD gamma. These decays are mediated by anomalous couplings D*D* - DD*, with the subsequent decay of D* into D pi or D gamma., AMER INST PHYSICS, 2016年, XITH CONFERENCE ON QUARK CONFINEMENT AND HADRON SPECTRUM, 1701, 英語

    [査読あり]

    研究論文(国際会議プロシーディングス)

  • Precision spectroscopy of pionic atoms and chiral symmetry in nuclei

    Itahashi Kenta, Ahn DeukSoon, Berg Georg P. A, Dozono Masanori, Etoh Daijiro, Fujioka Hiroyuki, Fukuda Naoki, Fukunishi Nobuhisa, Geissel Hans, Haettner Emma, Hashimoto Tadashi, Hayano Ryugo S, Hirenzaki Satoru, Horii Hiroshi, Ikeno Natsumi, Inabe Naoto, Iwasaki Masahiko, Kameda Daisuke, Kawase Shouichiro, Kisamori Keiichi, Kiyokawa Yu, Kubo Toshiyuki, Kusaka Kensuke, Matsushita Masafumi, Michimasa Shin'ichiro, Mishima Go, Miya Hiroyuki, Murai Daichi, Nagahiro Hideko, Nishi Takahiro, Ota Shinsuke, Sakamoto Naruhiko, Sekiguchi Kimiko, Suzuki Hiroshi, Suzuki Ken, Takaki Motonobu, Takeda Hiroyuki, Tanaka Yoshiki K, Uesaka Tomohiro, Wada Yasumori, Watanabe Yuni N, Weick Helmut, Yamakami Hiroki, Yanagisawa Yoshiyuki, Yoshida Koichi

    2016年, MESON 2016 - 14TH INTERNATIONAL WORKSHOP ON MESON PRODUCTION, PROPERTIES AND INTERACTION, 130

    [査読あり]

  • Search for η ′ mesic nuclei by missing-mass spectroscopy of the 12C(p, d) reaction

    Tanaka Y.K, Ayyad Y, Benlliure J, Brinkmann K.-T, Friedrich S, Fujioka H, Geissel H, Gellanki J, Guo C, Gutz E, Haettner E, Harakeh M.N, Hayano R.S, Higashi Y, Hirenzaki S, Hornung C, Igarashi Y, Ikeno N, Itahashi K, Iwasaki M, Jido D, Kalantar-Nayestanaki N, Kanungo R, Knoebel R, Kurz N, Metag V, Mukha I, Nagae T, Nagahiro H, Nanova M, Nishi T, Ong H.J, Pietri S, Prochazka A, Rappold C, Reiter M.P, Rodr{\'i}guez, S{\'a}nchez J.L, Scheidenberger C, Simon H, Sitar B, Strmen P, Sun B, Suzuki K, Szarka I, Takechi M, Tanihata I, Terashima S, Watanabe Y.N, Weick H, Widmann E, Winfield J.S, Xu X, Yamakami H, Zhao J

    2016年, EPJ Web of Conferences, 130

    [査読あり]

  • Formation of eta'(958) Bound States by (gamma,d) Reaction

    永廣秀子

    2016年01月, B47, 367-372, 英語

    [査読あり]

  • Measurement of excitation spectra in the C 12 (p,d) reaction near the η′ emission threshold

    Tanaka, Y.K., Itahashi, K., Fujioka, H., Ayyad, Y., Benlliure, J., Brinkmann, K.-T., Friedrich, S., Geissel, H., Gellanki, J., Guo, C., Gutz, E., Haettner, E., Harakeh, M.N., Hayano, R.S., Higashi, Y., Hirenzaki, S., Hornung, C., Igarashi, Y., Ikeno, N., Iwasaki, M., Jido, D., Kalantar-Nayestanaki, N., Kanungo, R., Knöbel, R., Kurz, N., Metag, V., Mukha, I., Nagae, T., Nagahiro, H., Nanova, M., Nishi, T., Ong, H.J., Pietri, S., Prochazka, A., Rappold, C., Reiter, M.P., Rodríguez-Sánchez, J.L., Scheidenberger, C., Simon, H., Sitar, B., Strmen, P., Sun, B., Suzuki, K., Szarka, I., Takechi, M., Tanihata, I., Terashima, S., Watanabe, Y.N., Weick, H., Widmann, E., Winfield, J.S., Xu, X., Yamakami, H., Zhao, J.

    2016年, Physical Review Letters, 117 (20), 202501, 英語

    [査読あり]

    研究論文(学術雑誌)

  • Formation of Deeply Bound Pionic Atoms and Pion Properties in Nuclei

    N. Ikeno, J. Yamagata-Sekihara, H. Nagahiro, S. Hirenzaki

    We study theoretically the formation of deeply bound pionic atoms to deduce the pion properties in nuclei precisely from the observables. We show the theoretical formation spectra of deeply bound pionic atoms in the various cases. We consider the pionic atom formation on the even-even and neutron-odd nucleus targets. We also show the angular dependence of the formation spectra in the (d, He-3) reactions. Based on these theoretical results, we have found that we can obtain the systematic information on several deeply bound states for various nuclei. Actually, these observations have been performed in the experiments at RIBF/RIKEN., POLISH ACAD SCIENCES INST PHYSICS, 2015年05月, ACTA PHYSICA POLONICA A, 127 (5), 1568 - 1570, 英語

    [査読あり]

    研究論文(学術雑誌)

  • Formation spectra of pionic atoms in the Green's function method

    Natsumi Ikeno, Junko Yamagata-Sekihara, Hideko Nagahiro, Satoru Hirenzaki

    We study the formation spectra of deeply bound pionic atoms in the (d, He-3) reactions using the Green's function method, stimulated by recent developments in experimental techniques. The Green's function method is considered to be a better theoretical formalism than the effective number approach to evaluate the formation rate of unstable systems. We compare the calculated results by the Green's function method with those by the effective number approach in various cases. We find that the differences between the results obtained by both methods are reasonably small and we can reaffirm that the effective number approach is a good theoretical method for the analyses of the previous experimental data with typical binding-energy errors of Delta B. E. greater than or similar to 20 keV for the deeply bound pionic atoms. On the other hand, we think that theoretical results using the Green's function method will be necessary in the near future to deduce precise information on the pion properties in nuclei from analyses of the pionic atom data with better accuracy than before., OXFORD UNIV PRESS INC, 2015年03月, Progress of Theoretical and Experimental Physics, (3), 033D01, 英語

    [査読あり]

    研究論文(学術雑誌)

  • Decays of doubly charmed meson molecules

    R. Molina, A. Hosaka, H. Nagahiro

    The interaction between pseudoscalar and/or vector mesons can be studied using hidden gauge Lagrangians. In this framework, the interaction between charmed mesons has been studied. Furthermore, doubly charmed states are also predicted. These new states are near the D* D* and D* D-s* thresholds, and have spin-parity J(P) = 1(+). We evaluate the decay widths of these states, named as R-cc(3970) and S-cc(4100) (with strangeness), and obtain 44 MeV for the non-strangeness, and 24 MeV for the doubly charm-strange state. Essentially, the decay modes are DD(s)pi and DD(s)gamma, being the D pi and D gamma emitted by one of the D* meson which forms the molecule., WORLD SCIENTIFIC PUBL CO PTE LTD, 2015年, Chiral Symmetry in Hadrons and Nuclei, 124 - 127, 英語

    [査読あり]

    研究論文(国際会議プロシーディングス)

  • EXOTIC ATOMS AND EXOTIC NUCLEI

    S. Hirenzaki, H. Nagahiro, N. Ikeno, J. Yamagata-Sekihara

    In this article, we briefly review the study of the exotic atoms and exotic nuclei, and report on recent research activities of eta-mesic nucleus and kaonic atoms., WYDAWNICTWO UNIWERSYTETU JAGIELLONSKIEGO, 2015年01月, ACTA PHYSICA POLONICA B, 46 (1), 121 - 126, 英語

    [査読あり]

    研究論文(学術雑誌)

  • Elementarity of composite systems

    Hideko Nagahiro, Atsushi Hosaka

    The "compositeness" or "elementarity" is investigated for s-wave composite states dynamically generated by energy-dependent and independent interactions. The bare mass of the corresponding fictitious elementary particle in an equivalent Yukawa model is shown to be infinite, indicating that the wave function renormalization constant Z is equal to zero. The idea can be equally applied to both resonant and bound states. In a special case of zero-energy bound states, the condition Z = 0 does not necessarily mean that the elementary particle has the infinite bare mass. We also emphasize arbitrariness in the "elementarity" leading to multiple interpretations of a physical state, which can be either a pure composite state with Z = 0 or an elementary particle with Z not equal 0. The arbitrariness is unavoidable because the renormalization constant Z is not a physical observable., AMER PHYSICAL SOC, 2014年12月, PHYSICAL REVIEW C, 90 (6), 065201, 英語

    [査読あり]

    研究論文(学術雑誌)

  • Experimental constraints on the omega-nucleus real potential

    S. Friedrich, K. Makonyi, V. Metag, D. Bayadilov, B. Bantes, R. Beck, Y. A. Beloglazov, S. Boese, K. -T. Brinkmann, Th. Challand, V. Crede, T. Dahlke, F. Dietz, P. Drexler, H. Eberhardt, D. Elsner, R. Ewald, K. Fornet-Ponse, F. Frommberger, Ch. Funke, M. Gottschall, A. Gridnev, M. Gruener, E. Gutz, Ch. Hammann, D. Hammann, J. Hannappel, J. Hartmann, W. Hillert, S. Hirenzaki, P. Hoffmeister, Ch. Honisch, I. Jaegle, D. Kaiser, H. Kalinowsky, S. Kammer, I. Keshelashvili, V. Kleber, F. Klein, B. Krusche, M. Lang, I. V. Lopatin, Y. Maghrbi, M. Nanova, H. Nagahiro, J. Mueller, T. Odenthal, D. Piontek, T. Rostomyan, S. Schaepe, Ch. Schmidt, H. Schmieden, R. Schmitz, T. Seifen, A. Thiel, U. Thoma, H. van Pee, D. Walther, J. Weil, Ch. Wendel, U. Wiedner, A. Wilson, A. Winnebeck, F. Zenke

    In a search for omega mesic states, the production of omega-mesons in coincidence with forward going protons has been studied in photon induced reactions on C-12 for incident photon energies of 1250-3100 MeV. The pi(0)gamma pairs from decays of bound or quasi-free omega-mesons have been measured with the CBELSA/TAPS detector system in coincidence with protons registered in the MiniTAPS forward array. Structures in the total energy distribution of the pi(0)gamma pairs, which would indicate the population and decay of bound omega B-11 states, are not observed. The pi(0)gamma cross section of 0.3 nbMeV(-1) sr(-1) observed in the bound state energy regime between -100 and 0 MeV may be accounted for by yield leaking into the bound state regime because of the large in-medium width of the omega-meson. A comparison of the measured total energy distribution with calculations suggests the real part V-0 of the omega B-11 potential to be small and only weakly attractive with V-0(rho = rho(0)) = -15 +/- 35(stat) +/- 20(syst) MeV in contrast to some theoretical predictions of attractive potentials with a depth of 100-150 MeV. (C) 2014 The Authors. Published by Elsevier B.V., ELSEVIER SCIENCE BV, 2014年09月, PHYSICS LETTERS B, 736, 26 - 32, 英語

    [査読あり]

    研究論文(学術雑誌)

  • Meson properties from mesic atoms and mesic nuclei

    Satoru Hirenzaki, Natsumi Ikeno, Hideko Nagahiro, Yuko Higashi

    Meson properties are believed to have close connection to the fundamental theory, QCD, and have been studied for a long time both theoretically and experimentally. In this report, we study the recent activities in this field and consider the eta(958) mesic nuclei and the deeply bound pionic atoms. We summarize the possible formation of the eta(958) mesic nuclei by the (p, d) reactions and report the new possibilities of the spectroscopic study of the pionic atoms using the (d,He-3) reactions., E D P SCIENCES, 2014年, MESON 2014 - 13TH INTERNATIONAL WORKSHOP ON PRODUCTION, PROPERTIES AND INTERACTION OF MESONS, 81, 英語

    [査読あり]

    研究論文(国際会議プロシーディングス)

  • Complex 2D Matrix Model and Its Application to $N_c$-dependence of Hadron Structures

    Nawa Kanabu, Ozaki Sho, Nagahiro Hideko, Jido Daisuke, Hosaka Atsushi

    2014年01月, PoS, Hadron2013, 108

    [査読あり]

  • Role of vector and pseudoscalar mesons in understanding 1/2 - N* and Delta resonances

    永廣秀子

    2013年12月, 88, 114016, 英語

    [査読あり]

  • Composite and elementary nature of a resonance in the sigma model

    Hideko Nagahiro, Atsushi Hosaka

    We analyze the mixing nature of the low-lying scalar resonance consisting of the pi pi composite and the elementary particle within the sigma model. A method to disentangle the mixing is formulated in the scattering theory with the concept of the two-level problem. We investigate the composite and elementary components of the sigma meson by changing a mixing parameter. We also study the dependence of the results on model parameters such as the cut-off value and the mass of the elementary sigma meson., AMER PHYSICAL SOC, 2013年11月, PHYSICAL REVIEW C, 88 (5), 055203, 英語

    [査読あり]

    研究論文(学術雑誌)

  • Formation of the eta '(958)-mesic nuclei in missing mass spectroscopies

    Hideko Nagahiro

    We calculate the formation cross section of the eta'-mesic nuclei by (pi, N) and (p, d) reactions based on the latest theoretical considerations of the eta' properties in nucleus. The results shown here are important to give predictions and support for future experiments and to establish the connection between the eta' mesic nucleus formation spectra and the modifications of the eta' properties at finite density, which will give us new information on the eta' mass generation mechanism. (C) 2013 Elsevier B.V. All rights reserved., ELSEVIER SCIENCE BV, 2013年09月, NUCLEAR PHYSICS A, 914, 360 - 364, 英語

    [査読あり]

    研究論文(学術雑誌)

  • eta ' meson under partial restoration of chiral symmetry in nuclear medium

    Daisuke Jido, Shuntaro Sakai, Hideko Nagahiro, Satoru Hirenzaki, Natsumi Ikeno

    In-medium modification of the eta' mass is discussed in the context of partial restoration of chiral symmetry in nuclear medium. We emphasize that the U-A (1) anomaly effects cause the eta'-eta mass difference necessarily through the chiral symmetry breaking. As a consequence, the eta' mass is expected to be reduced by order of 100 MeV in nuclear matter where about 30% reduction of chiral symmetry takes place. The strong attraction relating to the eta' mass generation eventually implies that there should be also a strong attractive interaction in the scalar channel of the eta'-N two-body system. We find that the attraction can be strong enough to form a bound state. (C) 2012 Elsevier B.V. All rights reserved., ELSEVIER SCIENCE BV, 2013年09月, NUCLEAR PHYSICS A, 914, 354 - 359, 英語

    [査読あり]

    研究論文(学術雑誌)

  • Nuclear density probed by anti-kaon-nucleus systems and anti-kaon-nucleus interaction

    J. Yamagata-Sekihara, N. Ikeno, H. Nagahiro, D. Jido, S. Hirenzaki

    Effective nuclear densities probed by anti-kaon-nucleus systems is studied theoretically both for bound and low energy scattering states. As for the bound states, we investigate kaonic atoms. We find that the effective density depends on the atomic states significantly and we have the possibility to obtain the anti-kaon properties at various nuclear densities by observing the several kaonic atom states. We also find the energy dependence of the probed density by scattering states. We find that the study of the effective nuclear density will help to find the proper systems to investigate the meson properties at various nuclear densities. (C) 2013 Elsevier B.V. All rights reserved., ELSEVIER SCIENCE BV, 2013年09月, NUCLEAR PHYSICS A, 914, 344 - 348, 英語

    [査読あり]

    研究論文(学術雑誌)

  • Lambda and Sigma resonances coupled to vector and pseudoscalar mesons

    K. P. Khemchandani, A. Martinez Torres, H. Nagahiro, A. Hosaka

    The vector and pseudoscalar meson-baryon systems have been studied in a coupled channel formalism recently, which has lead to findings of some important results. The formalism consists of obtaining a detailed vector meson-baryon interaction originating from the s-, t-, u-channel diagrams and a contact interaction, all derived from the Lagrangian invariant under the gauge of the hidden local symmetry (HLS). We find the contributions from all the diagrams (except s-channel) to be important, contrary to the systems involving light Goldstone bosons where Weinberg-Tomozawa interaction gives the dominant contribution. Further, the transitions between the pseudoscalar meson-baryon (PB) and vector meson-baryon (VB) channels is obtained consistently by extending the Kroll-Ruderman theorem by replacing the photon by a vector meson, assuming the vector meson dominance. We find that the low-lying resonances couple strongly to VB channels. This information can be very useful in studying processes like photoproduction of low-lying resonances. Further, we find dynamical generation of new states in PB-VB coupled systems which can be related to the known resonances: Lambda(2000), Sigma(1750), Sigma(1940) and Sigma(2000). (C) 2012 Elsevier B.V. All rights reserved., ELSEVIER SCIENCE BV, 2013年09月, NUCLEAR PHYSICS A, 914, 300 - 304, 英語

    [査読あり]

    研究論文(学術雑誌)

  • (d,He-3) reaction on an odd-neutron nuclear target for the formation of deeply bound pionic atoms

    Natsumi Ikeno, Junko Yamagata-Sekihara, Hideko Nagahiro, Satoru Hirenzaki

    We consider pionic atom spectroscopy by the (d,He-3) reaction on an odd-neutron nuclear target in this article, which has not yet been investigated. In the (d,He-3) reaction on the odd-neutron nuclear target, we can observe pionic states in the even-neutron nucleus with spin-parity 0(+). We expect that these pionic states do not have additional shifts due to the effects of the residual interaction between neutron-hole and pionic states. For the even-neutron nuclear target cases, we may have to take into account the residual interaction effects to deduce the binding energies of the pionic states precisely from the high-precision experimental data, since the final pionic states are pion-particle plus neutron-hole [pi circle times n(-1)] states. Thus, in addition to widening the domain of pionic atom spectroscopy on the nuclear chart, the present study of the (d,He-3) reaction on an odd-neutron target is considered to be important to deduce extremely precise information on the binding energies of the observed pionic states, and to clarify the pion properties and aspects of the symmetries of the strong interaction at finite density. We modify the formula of the even-even nuclear target case to study pionic atom formation spectra on the even-odd nuclear target and show the numerical results of the Sn-117 target case. This experiment will be performed at RIBF/RIKEN in the near future., OXFORD UNIV PRESS INC, 2013年06月, PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS, 2013 (6), 063D01, 1-15, 英語

    [査読あり]

    研究論文(学術雑誌)

  • Formation of eta '(958)-mesic nuclei by the (p,d) reaction

    Hideko Nagahiro, Daisuke Jido, Hiroyuki Fujioka, Kenta Itahashi, Satoru Hirenzaki

    We calculate theoretically the formation spectra of. n' (958)-nucleus systems in the (p,d) reaction for the investigation of in-medium modification of the. n' mass. We show comprehensive numerical calculations based on a simple form of the. n' optical potential in nuclei with various potential depths. We conclude that one finds evidence of a possible attractive interaction between. n' and the nucleus as a peak structure appearing around the. n' threshold in light nuclei such as C-11, when the attractive potential is stronger than 100 MeV and the absorption width is of order 40 MeV or less. Spectroscopy of the (p, d) reaction is expected to be performed experimentally at existing facilities, such as GSI. We also estimate the contributions from the omega and phi mesons, which have masses close to the. n' meson, concluding that the observation of the peak structure of the. n' -mesic nuclei is not disturbed, although their contributions may not be small., AMER PHYSICAL SOC, 2013年04月, PHYSICAL REVIEW C, 87 (4), 045201, 英語

    [査読あり]

    研究論文(学術雑誌)

  • Composite and elementary components in hadron resonances

    Hosaka Atsushi, Hyodo Tetsuo, Jido Daisuke, Nagahiro Hideko, Nawa Kanabu, Ohkoda Shunsuke, Ozaki Sho, Yamaguchi Yasuhiro, Yasui Shigehiro

    2013年, Few Body Syst., 54, 19

    [査読あり]

  • Complex 2D Matrix Model and Geometrical Map on Complex Plane

    永廣秀子

    2013年, 2013 (8), 083D01, 1-13, 英語

    [査読あり]

  • Hadron resonances with coexistence of different natures

    Hosaka Atsushi, Hyodo Tetsuo, Jido Daisuke, Nagahiro Hideko, Nawa Kanabu, Ohkoda Shunsuke, Ozaki Sho, Yamaguchi Yasuhiro, Yasui Shigehiro

    2012年10月, EPJ Web Conf., 20, 01005

    [査読あり]

  • Spectroscopy of η′ -nucleus bound states at GSI-SIS

    Fujioka H, Itahashi K, Geissel H, Hayano R.S, Hirenzaki S, Itoh S, Jido D, Metag V, Nagahiro H, Nanova M, Nishi T, Okochi K, Outa H, Suzuki K, Suzuki T, Tanaka Y.K, Weick H

    2012年09月, EPJ Web of Conferences, 37, 英語

    [査読あり]

    研究論文(国際会議プロシーディングス)

  • Feasibility Study of Observing eta ' Mesic Nuclei with (p, d) Reaction

    Kenta Itahashi, Hiroyuki Fujioka, Hans Geissel, Ryugo S. Hayano, Satoru Hirenzaki, Satoshi Itoh, Daisuke Jido, Volker Metag, Hideko Nagahiro, Mariana Nanova, Takahiro Nishi, Kota Okochi, Haruhiko Outa, Ken Suzuki, Yoshiki K. Tanaka, Helmut Weick

    A novel method is proposed to measure eta' (958) meson bound states in C-11 nuclei by missing mass spectroscopy of the C-12(p, d) reaction near the eta' production threshold. It is shown that peak structures will be observed experimentally in an inclusive measurement in case that the in-medium eta' mass reduction is sufficiently large and that the decay width of eta' mesic states is narrow enough. Such a measurement will be feasible with the intense proton beam supplied by the SIS synchrotron at GSI combined with the good energy resolution of the fragment separator FRS., PROGRESS THEORETICAL PHYSICS PUBLICATION OFFICE, 2012年09月, PROGRESS OF THEORETICAL PHYSICS, 128 (3), 601 - 613, 英語

    [査読あり]

    研究論文(学術雑誌)

  • Negative parity Lambda and Sigma resonances coupled to pseudoscalar and vector mesons

    K. P. Khemchandani, A. Martinez Torres, H. Nagahiro, A. Hosaka

    An exploration of the dynamically generated Lambda and Sigma resonances has been made in the vector meson-baryon (VB) systems coupled to pseudoscalar meson-baryon (PB) channels. The VB interactions are obtained from the Lagrangians written within the hidden local symmetry which, in addition to Yukawa-type vector-baryon-baryon (VBB) vertices, naturally gives rise to a contact interaction. Using the VBB vertices, we calculate the t-, s-, and u-channel diagrams considering the octet baryon exchange in the latter two cases. For the PB channels we rely on the the Weinberg-Tomozawa interactions and calculate the PB <-> VB transition amplitudes extending the Kroll-Ruderman theorem by replacing the photon by the vector mesons. In addition to the low-lying Lambda(1405), Lambda(1670) found in previous works, we find resonances which coincide well with Lambda(2000), Sigma(1750)(S11), Sigma(1940)(D13), Sigma(2000)(S11) and predict three Lambda*'s with J(pi) = 3/2(-) and masses 1754 - i2 MeV, 1862 - i33 MeV, 2139 - i14 MeV together with a broad 1/2(-) Sigma* with mass similar to 1430 MeV. We find that most of these next-to-low-lying states couple weakly with the pseudoscalar mesons, which implies that it is important to study the reactions with VB final states in order to obtain reliable information on the properties of such resonances., AMER PHYSICAL SOC, 2012年06月, PHYSICAL REVIEW D, 85 (11), 114020, 英語

    [査読あり]

    研究論文(学術雑誌)

  • Nuclear bound state of eta ' (958) and partial restoration of chiral symmetry in the eta ' mass

    Daisuke Jido, Hideko Nagahiro, Satoru Hirenzaki

    The in-medium mass of the eta' meson is discussed in a context of partial restoration of chiral symmetry in nuclear medium. The eta' mass is expected to be reduced by an order of 100 MeV at the saturation density. The reduction is a consequence of the suppression of the anomaly effect on the eta' mass induced by partial restoration of chiral symmetry. This strong attraction in eta' nuclear systems does not accompany large absorption of eta' into nuclear matter. This leads to the possibility of so narrow bound states of the eta' meson in nuclei to be seen in hadronic reactions with light nuclear targets., AMER PHYSICAL SOC, 2012年03月, PHYSICAL REVIEW C, 85 (3), 032201, 英語

    [査読あり]

    研究論文(学術雑誌)

  • eta '-Nucleus optical potential and possible eta ' bound states

    H. Nagahiro, S. Hirenzaki, E. Oset, A. Ramos

    Starting from a recent model of the eta'N interaction, we evaluate the eta'-nucleus optical potential, including the contribution of lowest order in density, t rho/2m(eta'), together with the second-order terms accounting for eta' absorption by two nucleons. We also calculate the formation cross section of the eta' bound states from (pi(+), p) reactions on nuclei. The eta'-nucleus potential suffers from uncertainties tied to the poorly known eta'N interaction, which can be partially constrained by the experimental modulus of the eta'N scattering length and/or the recently measured transparency ratios in eta' nuclear photoproduction. Assuming an attractive interaction and taking the claimed experimental value vertical bar a(eta'N)vertical bar = 0.1 fm, we obtain an eta' optical potential in nuclear matter at saturation density of V eta' = -(8.7 + 1.8i) MeV, not attractive enough to produce eta' bound states in light nuclei. Larger values of the scattering length give rise to deeper optical potentials, with moderate enough imaginary parts. For a value vertical bar a(eta'N)vertical bar = 0.3 fm, which can still be considered to lie within the uncertainties of the experimental constraints, the spectra of light and medium nuclei show clear structures associated to eta'-nuclear bound states and to threshold enhancements in the unbound region. (C) 2012 Elsevier B.V. All rights reserved., ELSEVIER SCIENCE BV, 2012年03月, PHYSICS LETTERS B, 709 (1-2), 87 - 92, 英語

    [査読あり]

    研究論文(学術雑誌)

  • Formation of deeply bound pionic atoms in Sn isotopes

    Natsumi Ikeno, Hideko Nagahiro, Daisuke Jido, Satoru Hirenzaki

    We study the formation of deeply bound pionic atoms in the (d,He-3) reactions theoretically and show the energy spectra of the emitted He-3 at finite angles. We find that the different combinations of the pion-bound and neutron-hole states dominate the formation spectra at different scattering angles because of the matching condition of the reaction. We conclude that the observation of the (d,He-3) reaction at finite angles will provide the systematic information of the pionic bound states in each nucleus, and it will help to develop the study of the pion properties and the partial restoration of chiral symmetry in nuclei., E D P SCIENCES, 2012年, MESON 2012 - 12TH INTERNATIONAL WORKSHOP ON PRODUCTION, PROPERTIES AND INTERACTION OF MESONS, 37, 英語

    [査読あり]

    研究論文(国際会議プロシーディングス)

  • eta ' meson under partial restoration of chiral symmetry in nuclear medium

    Daisuke Jido, Hideko Nagahiro, Satoru Hirenzaki, Shuntaro Sakai

    We shed light upon the eta ' mass in nuclear matter in the context of partial restoration of chiral symmetry, pointing out that the U-A ( 1) anomaly effects causes the eta '-eta mass difference necessarily through the chiral symmetry breaking As a consequence, it is expected that the eta ' mass is reduced by order of 100 MeV in nuclear matter where partial restoration of chiral symmetry takes place. The discussion given here is based on Ref. [1], E D P SCIENCES, 2012年, MESON 2012 - 12TH INTERNATIONAL WORKSHOP ON PRODUCTION, PROPERTIES AND INTERACTION OF MESONS, 37, 09019, 英語

    [査読あり]

    研究論文(国際会議プロシーディングス)

  • Formation of eta-prime(958) mesic nuclei

    Hirenzaki Satoru, Jido Daisuke, Nagahiro Hideko

    2012年, EPJ Web Conf., 37, 02001

    [査読あり]

  • Pionic atom spectroscopy in the (d, He-3) reaction at finite angles

    N. Ikeno, H. Nagahiro, S. Hirenzaki

    We study the formation of deeply bound pionic atoms in the (d, He-3) reactions theoretically and show the energy spectra of the emitted He-3 at finite angles, which are expected to be observed experimentally. We find that the different combinations of the pion-bound and neutron-hole states dominate the spectra at different scattering angles because of the matching condition of the reaction. We conclude that the observation of the (d, He-3) reaction at finite angles will provide the systematic information of the pionic bound states in each nucleus and will help to develop the study of the pion properties and the partial restoration of chiral symmetry in nuclei., SPRINGER, 2011年12月, EUROPEAN PHYSICAL JOURNAL A, 47 (12), 161 - 167, 英語

    研究論文(学術雑誌)

  • Coupling vector and pseudoscalar mesons to study baryon resonances

    K. P. Khemchandani, A. Martinez Torres, H. Kaneko, H. Nagahiro, A. Hosaka

    A study of meson-baryon systems with total strangeness -1 is made within a framework based on the chiral and hidden local symmetries. These systems consist of octet baryons, pseudoscalar and vector mesons. The pseudoscalar meson-baryon (PB) dynamics has been earlier found determinant for the existence of some strangeness -1 resonances, for example, Lambda(1405), Lambda(1670), etc. The motivation of the present work is to study the effect of coupling the closed vector meson-baryon (VB) channels to these resonances. To do this, we obtain the PB -> PB and VB -> VB amplitudes from the t-channel diagrams and the PB <-> VB amplitudes are calculated using the Kroll-Ruddermann term where, considering the vector meson dominance phenomena, the photon is replaced by a vector meson. The calculations done within this formalism reveal a very strong coupling of the VB channels to the Lambda(1405) and Lambda(1670). In the isospin 1 case, we find evidence for a double pole structure of the Sigma(1480) which, like the isospin 0 resonances, is also found to couple strongly to the VB channels. The strong coupling of these low-lying resonances to the VB channels can have important implications on certain reactions producing them., AMER PHYSICAL SOC, 2011年11月, PHYSICAL REVIEW D, 84 (9), 094018, 英語

    [査読あり]

    研究論文(学術雑誌)

  • Formation of heavy-meson bound states by two-nucleon pick-up reactions

    N. Ikeno, J. Yamagata-Sekihara, H. Nagahiro, D. Jido, S. Hirenzaki

    We develop a model to evaluate the formation rate of the heavy mesic nuclei in two-nucleon pick-up reactions and apply it to the (6)Li target cases for the formation of heavy meson-alpha bound states, as examples. The existence of the quasideuteron in the target nucleus is assumed in this model. It is found that mesic nuclei formation in recoilless kinematics is possible even for heavier mesons than the nucleon in two-nucleon pick-up reactions. We find the formation rate of the meson-alpha bound states can be around half of the elementary cross sections at the recoilless kinematics with small distortions., AMER PHYSICAL SOC, 2011年11月, PHYSICAL REVIEW C, 84 (5), 054609, 英語

    [査読あり]

    研究論文(学術雑誌)

  • Precision Spectroscopy of Deeply Bound Pionic Atoms and Partial Restoration of Chiral Symmetry in Medium

    Natsumi Ikeno, Rie Kimura, Junko Yamagata-Sekihara, Hideko Nagahiro, Daisuke Jido, Kenta Itahashi, Li Sheng Geng, Satoru Hirenzaki

    We study theoretically the formation spectra of deeply bound pionic atoms expected to be observed by experiments with high energy resolution at RIBF/RIKEN, and we discuss in detail the possibilities to extract new information on the pion properties at finite density from the observed spectra, which may provide information on partial restoration of chiral symmetry in medium. We find that the non-yrast pionic states such as 2s are expected to be seen in the (d,He-3) spectra, which will be helpful to reduce uncertainties of the theoretical calculations in the neutron wave functions in nucleus. The observation of the 2s state with the ground is state is also helpful to reduce the experimental uncertainties associated in the calibration of the absolute excitation energy. We find that the nuclear densities probed by atomic pions are quite stable and almost constant for various atomic states and various nuclei. Effects of the pion wave function renormalization to the formation spectra are also evaluated., PROGRESS THEORETICAL PHYSICS PUBLICATION OFFICE, 2011年09月, PROGRESS OF THEORETICAL PHYSICS, 126 (3), 483 - 509, 英語

    [査読あり]

    研究論文(学術雑誌)

  • Vector meson-baryon dynamics and generation of resonances

    K. P. Khemchandani, H. Kaneko, H. Nagahiro, A. Hosaka

    The purpose of this work is to study vector meson-octet baryon interactions with the aim to find dynamical generation of resonances in such systems. For this, we consider s-, t-, u-channel diagrams along with a contact interaction originating from the hidden local symmetry Lagrangian. We find the contribution from all these sources, except the s channel, to be important. The amplitudes obtained by solving coupled channel Bethe-Salpeter equations for systems with total strangeness zero, show the generation of one isospin 3/2, spin 1/2 resonance and three isospin 1/2 resonances: two with spin 3/2 and one with spin 1/2. We identify these resonances with Delta(1900)S-31, N*(2080)D-13, N*(1700)D-13, and N*(2090)S-11, respectively., AMER PHYSICAL SOC, 2011年06月, PHYSICAL REVIEW D, 83 (11), 114041, 英語

    [査読あり]

    研究論文(学術雑誌)

  • Composite and elementary natures of a(1)(1260) meson

    Hideko Nagahiro, Kanabu Nawa, Sho Ozaki, Daisuke Jido, Atsushi Hosaka

    We develop a practical method to analyze the mixing structure of hadrons consisting of two components of quark composite and hadronic composite. As an example, we investigate the properties of the axial vector meson a(1)(1260) and discuss its mixing properties quantitatively. We also make reference to the large N-c procedure and its limitation for the classification of such a mixed state., AMER PHYSICAL SOC, 2011年06月, PHYSICAL REVIEW D, 83 (11), 111504, 英語

    [査読あり]

    研究論文(学術雑誌)

  • Decay of vector-vector resonances into gamma and a pseudoscalar meson

    R. Molina, H. Nagahiro, A. Hosaka, E. Oset

    We study the decay of dynamically generated resonances from the interaction of two vectors into a gamma and a pseudoscalar meson. The dynamics requires anomalous terms involving vertices with two vectors and a pseudoscalar, which renders it special. We compare our result with data on K(2)*(+) (1430) -> K(+) gamma and K(2)*(0) (1430) -> K(0) gamma and find a good agreement with the data for the K(2)*(+) (1430) case and a width considerably smaller than the upper bound measured for the K(2)*(0) (1430) meson. We also investigate the decay into pi(+) gamma of one a(2) state, tentatively associated to the a(2)(1320), obtaining qualitative agreement with data., AMER PHYSICAL SOC, 2011年05月, PHYSICAL REVIEW D, 83 (9), 094030, 英語

    [査読あり]

    研究論文(学術雑誌)

  • Vector meson-baryon interaction to study dynamical generation of resonances.

    K. P. Khemchandani, A. Hosaka, H. Kaneko, H. Nagahiro

    With the motivation to find dynamical generation of resonances, we study vector-meson baryon interaction by taking s-, t-, u-channel diagrams and a contact interaction into account. A comparison of the different contributions obtained from these diagrams is done in the SU(2) limit, which shows that these diagrams could be equally important. We find it worthwhile to pay attention to the structure of the total interaction between the two non-zero spin particles which possess similar masses and find spin dependent interaction similar to the nucleon-nucleon case., AMER INST PHYSICS, 2011年, INTERNATIONAL CONFERENCE ON THE STRUCTURE OF BARYONS (BARYONS '10), 1388, 英語

    [査読あり]

    研究論文(国際会議プロシーディングス)

  • A study of mixing properties of a(1)(1260) meson

    H. Nagahiro, K. Nawa, S. Ozaki, D. Jido, A. Hosaka

    We develop a practical method to analyze the mixing structure of hadrons consisting of two components of quark composite and hadronic composite by taking the a(1)(1260) meson as an example. We also make reference to the large N-c procedure and its limitation for the classification of such a mixed state., AMER INST PHYSICS, 2011年, INTERNATIONAL CONFERENCE ON THE STRUCTURE OF BARYONS (BARYONS '10), 1388 (1), 302, 英語

    [査読あり]

    研究論文(国際会議プロシーディングス)

  • Structure and Formation of eta- and pi-Nucleus Systems

    Satoru Hirenzaki, Natsumi Ikeno, Daisuke Jido, Hideko Nagahiro

    In this article, we review recent research activities on the structure and formation of the eta mesic nuclei and the pionic atoms., AMER INST PHYSICS, 2011年, INTERNATIONAL CONFERENCE ON THE STRUCTURE OF BARYONS (BARYONS '10), 1388 (1), 495, 英語

    [査読あり]

    研究論文(国際会議プロシーディングス)

  • Pionic Atom spectroscopy in the (d,3He) reaction at finite density

    永廣秀子

    2011年, A47, 161, 英語

    [査読あり]

  • Deeply bound pionic states in Sn at RIKEN RI Beam Factory

    Ikeno N, Nagahiro H, Hirenzaki S, Yamagata-Sekihara J, Jido D

    2010年11月, Workshop on Hadron and Nuclear Physics, 206

    [査読あり]

  • Phi Photoproduction in a Coupled-Channel Approach

    S. Ozaki, H. Nagahiro, A. Hosaka, O. Scholten

    We investigate photoproduction of phi-mesons off protons within a coupled-channel effective-Lagrangian method which is based on the K-matrix approach. We take into account pi N, rho N, eta N, K Lambda, K Sigma, K Lambda (1520) and phi N channels. Especially we focus on K Lambda(1520) channel. We also introduce a nucleon resonance which couples to phi N and K Lambda (1520) channels. We find that coupled-channel effects are not sizable at very forward angle (theta = 0) and the resonance can reproduce a peak structure of the correct magnitude at the right energy. We also investigate the effects of coupled channels and the resonance on the angular distribution for phi-photoproduction., ELSEVIER SCIENCE BV, 2010年04月, NUCLEAR PHYSICS A, 835 (1-4), 321 - 324, 英語

    [査読あり]

    研究論文(学術雑誌)

  • Charged K* photoproduction in a Regge model

    Sho Ozaki, Hideko Nagahiro, Atsushi Hosaka

    We investigate the gamma p -> K*(+)Lambda reaction within a Regge approach. For the gauge invariance of the scattering amplitude, we reggeize the s channel and contact-term amplitudes as well as the t-channel amplitude. We obtain a decreasing behavior of the total cross section as the CLAS's preliminary data show. We also calculate spin density matrices and find clear differences between our Regge model and the previous Feynman (isobar) model., AMER PHYSICAL SOC, 2010年03月, PHYSICAL REVIEW C, 81 (3), 035206, 英語

    [査読あり]

    研究論文(学術雑誌)

  • Theoretical Study of Formation Rates of eta-, eta '- and omega-Mesic Nuclei Induced by the Pion Beam

    Hideko Nagahiro

    We present the theoretical study on formation rates of the eta-, eta'- and omega-meson-nucleus systems induced by the (pi, N) reactions on nuclear targets. For the eta-mesic nuclei, we can study the in-medium properties of the N*(1535) baryon resonance. As for the eta'(958) meson-nucleus system, the in-medium U(A) (1) anomaly effect might be observed. We can also know the in-medium behavior of the omega meson by the (pi, N) reaction with nuclear targets. We conclude that valuable information on mesons in the medium can be extracted from global structures of the missing mass spectra in the (pi, N) reaction., PROGRESS THEORETICAL PHYSICS PUBLICATION OFFICE, 2010年, PROGRESS OF THEORETICAL PHYSICS SUPPLEMENT, 186 (186), 316 - 324, 英語

    [査読あり]

    研究論文(学術雑誌)

  • A Coupled-channel analysis for phi-photoproduction with Lambda(1520)

    永廣秀子, 尾崎翔他

    2009年05月, 80, 035201, 英語

    [査読あり]

  • Scalar, axial-vector and tensor resonances from the rho D*, omega D* interaction in the hidden gauge formalism

    永廣秀子, R. Molin

    2009年05月, 80, 014025, 英語

    [査読あり]

  • Reaction dynamics for photoproductions of baryon resonances

    Hosaka A, Hyodo T, Jido D, Kim H.C, Nagahiro H, Nam S.I, Oka M, Ozaki S

    2009年, Chin.Phys.C, 33, 1167

    [査読あり]

  • Meson and Baryon resonances

    永廣秀子, E. Ose

    18th International Conference On Particles And Nuclei (PANIC 08), 9-14 Nov 2008, Eilat, Israel, 2009年01月, 827, 255c-260c, 英語

    [査読あり]

  • Formation spectra of light kaonic nuclei by in-flight (anti-K, N) reactions with chiral unitary amplitude

    永廣秀子, 山縣-関原淳子

    2008年12月, 80, 025204, 英語

    [査読あり]

  • Formation of eta-mesic nuclei by (pi,N) reaction and N*(1535) in medium

    永廣秀子

    2008年11月, 80, 025205, 英語

    [査読あり]

  • The gamma gamma decay of the f(0)(1370) and f(2)(1270) resonances in the hidden gauge formalism

    永廣秀子

    2008年09月, 79, 114023, 英語

    [査読あり]

  • Hidden gauge formalism for the radiative decays of axial-vector mesons

    永廣秀子

    2008年09月, 79, 014015, 英語

    [査読あり]

  • Role of meson loops in the f0 (1370), f0 (1500), and f0 (1710) decays into V gamma

    永廣秀子

    2008年05月, 78, 014012, 英語

    [査読あり]

  • Radiative decay into gamma P of the low lying axial-vector mesons

    永廣秀子

    2008年05月, 77, 034017, 英語

    [査読あり]

  • Meson loops in the f0(980) and a0(980) radiative decays into rho, omega

    永廣秀子

    2008年02月, 36, 73-84, 英語

    [査読あり]

  • Modern Physics Letters A: Preface

    A. Hosaka, T. Kunihiro, T. Myo, H. Nagahiro

    2008年, Modern Physics Letters A, 23 (27-30), v-vii, 英語

    [査読あり]

  • Level crossing of particle-hole and mesonic modes in eta mesic nuclei

    永廣秀子, 慈道大介他

    2008年01月, 811, 158-178, 英語

    [査読あり]

  • Structure and formation of kaonic atoms and kaonic nuclei

    永廣秀子, 山縣淳子他

    Workshop On Chiral Symmetry In Hadron And Nuclear Physics: Chiral07, 13-16 Nov 2007, Osaka, Japan, 2008年, 23, 2528-2531, 英語

    [査読あり]

  • Study of in-medium properties of N*(1535) and chiral symmetry for baryons through the eta-mesic nuclei formation at J-PARC

    永廣秀子

    Workshop On Chiral Symmetry In Hadron And Nuclear Physics: Chiral07, 13-16 Nov 2007, Osaka, Japan, 2008年, 23, 2512-2515, 英語

    [査読あり]

  • The role of the QCD anomaly in kaon photoproduction

    永廣秀子, 尾崎翔他

    Workshop On Chiral Symmetry In Hadron And Nuclear Physics: Chiral07, 13-16 Nov 2007, Osaka, Japan, 2008年, 23, 2325-2328, 英語

    [査読あり]

  • Magnetic interaction induced by the anomaly in kaon-photoproductions

    永廣秀子, 尾崎翔他

    2008年, 665, 178-181, 英語

    [査読あり]

  • Formation of deeply bound kaonic atoms in (K-, N) reactions

    J. Yamagata, H. Nagahiro, R. Kimura, S. Hirenzaki

    We study theoretically the (K-,N) reactions for the formation of the deeply bound kaonic atoms, which were predicted to be quasistable with narrow widths, using the Green's function method. We systematically consider various cases with different target nuclei and energies and find clear signals in the theoretical spectra for all cases considered in this article. The signals show very interesting structures, such as a RESONANCE DIP instead of a resonance peak. We discuss the origins of the interesting structures and the possibilities of obtaining new information on the existence of kaonic nuclei from the spectra of atomic state formations., AMER PHYSICAL SOC, 2007年10月, PHYSICAL REVIEW C, 76 (4), 045204, 英語

    [査読あり]

    研究論文(学術雑誌)

  • Possible omega bound states in nuclei produced with the (gamma, p) reaction

    M. Kaskulov, H. Nagahiro, S. Hirenzaki, E. Oset

    We perform calculations for omega production in nuclei by means of the (gamma,p) reaction for photon energies and proton angles suited to currently running and future experiments in present laboratories. For some cases of possible omega optical potentials, we find that clear peaks are observable when a good resolution in the omega energy is available. We also study the inclusive production of pi(0)gamma in nuclei around the omega energy and find a double hump structure for the energy spectra, with a peak around a pi(0)gamma energy of m(omega)-100 MeV, which could easily be misidentified by a signal of an omega bound state in nuclei, while it is actually due to a different scaling of the uncorrelated pi(0)gamma production and omega production with subsequent pi(0)gamma decay., AMERICAN PHYSICAL SOC, 2007年06月, PHYSICAL REVIEW C, 75 (6), 064616, 英語

    [査読あり]

    研究論文(学術雑誌)

  • Exotic mesic atoms for a class of strongly correlated fermi systems

    S. Hirenzaki, H. Nagahiro, J. Yamagata

    NOVA SCIENCE PUBLISHERS, INC, 2007年, CONDENSED MATTER THEORIES, VOL 21, 21, 351 - +, 英語

    [査読あり]

    研究論文(国際会議プロシーディングス)

  • eta- and eta '-mesic nuclei and U-A(1) anomaly at finite density

    Hideko Nagahiro, Makoto Takizawa, Satoru Hirenzaki

    We discuss theoretically the possibility of observing the bound states of the eta and eta(')(958) mesons in nuclei. We apply the NJL model to study the eta and eta(') meson properties at finite density and calculate the formation cross sections of the eta and eta(') bound states with the Green function method for (gamma,p) reaction. We also discuss the experimental feasibility at photon facilities like SPring-8. The contributions due to the omega meson production are also included to obtain the realistic (gamma,p) spectra. We conclude that we can expect to observe resonance peaks in (gamma,p) spectra for the formation of meson bound states and we can deduce new information on eta and eta(') properties at finite density. These observations are believed to be essential to know the possible mass shift of eta(') and deduce new information on the effective restoration of the U-A(1) anomaly in the nuclear medium., AMER PHYSICAL SOC, 2006年10月, PHYSICAL REVIEW C, 74 (4), 045203, 英語

    [査読あり]

    研究論文(学術雑誌)

  • In-flight (K-,p) reactions for the formation of kaonic atoms and kaonic nuclei using the Green function method

    J. Yamagata, H. Nagahiro, S. Hirenzaki

    We study theoretically the kaonic atom and kaonic nucleus formations in the in-flight (K-,p) reactions using the Green function method, which is suited to evaluate formation rates both of stable and unstable bound systems. We consider C-12 and O-16 as the targets and calculate the spectra of the (K-,p) reactions. We conclude that no peak structure resulting from kaonic nucleus formation is expected in the reaction spectra calculated with the chiral unitary kaon-nucleus optical potential. In the spectra with the phenomenological deep kaon-nucleus potential, it may be possible to observe some structures because of the formation of the kaonic nucleus states. For all cases, we find clear signals because of the kaonic atom formations in the reaction spectra, which show very interesting structures, such as the RESONANCE DIP instead of the resonance peak for the atomic 1s state formation., AMER PHYSICAL SOC, 2006年07月, PHYSICAL REVIEW C, 74 (1), 014604, 英語

    [査読あり]

    研究論文(学術雑誌)

  • eta '(958)-mesic nuclei formation and U-A(1) anomaly at finite density

    Hideko Nagahiro, Makoto Takizawa, Satoru Hirenzaki

    We discuss the possibility of producing the bound states of the eta'(958) meson in nuclei theoretically using the the Nambu-Jona-Lasinio (NJL) model. We calculate the formation cross section of the eta' bound states with the Green function method for the (gamma,p) reaction and discuss the experimental feasibility at photon facilities such as SPring-8. We conclude that we can expect to observe resonance peaks in (gamma,p) spectra for the formation of eta' bound states and we can deduce new information on eta' properties at finite density. These observations are believed to be essential to know the possible mass shift of eta' and deduce new information on the effective restoration of the chiral U-A (1) anomaly at finite density., AMER INST PHYSICS, 2006年, PARTICLES AND NUCLEI, 842, 228 - 230, 英語

    [査読あり]

    研究論文(国際会議プロシーディングス)

  • Formation of mesic nuclei by (gamma, p) reactions

    H Nagahiro, D Jido, S Hirenzaki

    We present a theoretical study on formation rates of eta and omega meson-nucleus systems induced by (gamma, p) reactions on nuclear targets at ideal recoilless condition. We find that the smaller distortion effect in the (gamma, p) reaction enables us to investigate properties of the mesons created deeply inside nucleus more clearly. We also consider excitation of scalar-isoscalar (sigma) mode in nucleus in order to investigate spectral enhancement around two-pion threshold caused by partial restoration of chiral symmetry. We conclude that valuable information of meson-nucleus interactions can be extracted from global structure of the missing mass spectra in the (gamma, p) reaction. (c) 2005 Elsevier B.V. All rights reserved., ELSEVIER SCIENCE BV, 2005年10月, NUCLEAR PHYSICS A, 761 (1-2), 92 - 119, 英語

    [査読あり]

    研究論文(学術雑誌)

  • Formation of kaonic atoms and kaonic nuclei in in-flight (K-,p) reactions

    J Yamagata, H Nagahiro, Y Okumura, S Hirenzaki

    We theoretically study kaonic atom and kaonic nucleus formation in in-flight (K-,p) reactions for C, O, Si and Ca targets. Deeply bound kaonic atoms were previously predicted to exist as quasi-stable states, and it is expected that they can be observed using certain well-suited experimental methods. Kaonic nuclear states have also been predicted to exist with large decay widths. We evaluate the formation cross sections of kaonic atoms and kaonic nuclei using an effective number approach. We show that indications of kaonic bound states can be observed in the outgoing proton energy spectra., PROGRESS THEORETICAL PHYSICS PUBLICATION OFFICE, 2005年08月, PROGRESS OF THEORETICAL PHYSICS, 114 (2), 301 - 316, 英語

    [査読あり]

    研究論文(学術雑誌)

  • Production of Theta(+) hypernuclei with the (K+,pi(+)) reaction

    H Nagahiro, S Hirenzaki, E Oset, MJV Vacas

    We present results on the production of bound states of Theta(+) in nuclei using the (K+, pi(+)) reaction. By taking into account the states obtained within a wide range of strength of the Theta(+) nucleus optical potential, plus the possibility to replace different nucleons of the nucleus, we obtain an excitation spectra with clearly differentiated peaks. The magnitude of the calculated cross sections is well within reachable range. (c) 2005 Elsevier B.V. All rights reserved., ELSEVIER SCIENCE BV, 2005年08月, PHYSICS LETTERS B, 620 (3-4), 125 - 130, 英語

    [査読あり]

    研究論文(学術雑誌)

  • Residual interaction effects on deeply bound pionic states in Sn and Pb isotopes

    N Nose-Togawa, H Nagahiro, S Hirenzaki, K Kume

    We have studied the residual interaction effects theoretically on the deeply bound pionic states in Pb and Sn isotopes. We need to evaluate the residual interaction effects carefully to deduce the nuclear medium effects for pion properties, which are believed to provide valuable information on nuclear chiral dynamics. The s- and p-wave pi N interactions are used for the pion-nucleon residual interactions. We show that the complex energy shifts are around [(10-20) + i(2-7)] keV for 1s states in Sn, which should be taken into account in the analyses of the high precision data of deeply bound pionic 1s states in Sn isotopes., AMER PHYSICAL SOC, 2005年06月, PHYSICAL REVIEW C, 71 (6), 英語

    [査読あり]

    研究論文(学術雑誌)

  • Formation of eta(')(958)-mesic nuclei and axial U-A(1) anomaly at finite density

    H Nagahiro, S Hirenzaki

    We discuss the possibility of producing the bound states of the eta(')(958) meson in nuclei theoretically. We calculate the formation cross sections of the eta(') bound states with the Green function method for the (gamma,p) reaction and discuss the experimental feasibility at photon facilities such as SPring-8. We conclude that we can expect to observe resonance peaks in (gamma,p) spectra for the formation of eta(') bound states and we can deduce new information on eta(') properties at finite density. These observations are believed to be essential to know the possible mass shift of eta(') and deduce new information on the effective restoration of the chiral U-A(1) anomaly in the nuclear medium., AMERICAN PHYSICAL SOC, 2005年06月, PHYSICAL REVIEW LETTERS, 94 (23), 232503, 英語

    [査読あり]

    研究論文(学術雑誌)

  • Production of circle dot(+) hypernuclei with the (K+,pi(+)) reaction

    H Nagahiro, S Hirenzaki, E Oset, MJV Vacas

    We investigate the formation cross sections of the Theta(+)-hypernuclei theoretically. In the (K+,pi(+)) reaction, we obtain the excitation spectra with clearly differentiated peaks corresponding to the Theta(+) bound states., WORLD SCIENTIFIC PUBL CO PTE LTD, 2005年, Pentaquark 04, Proceedings, 378 - 385, 英語

    [査読あり]

    研究論文(国際会議プロシーディングス)

  • Residual interaction effects on deeply bound pionic states in Sn and Pb isotopes

    久米 健次, N. Nose-Togawa, H. Nagahiro, S. Hirenzaki, K. Kume

    2005年, Physical Review, 71 (6), 061601

    [査読あり]

  • In-medium properties of N*(1535) in chiral models and eta-nucleus interaction

    Nagahiro H, Hirenzaki S, Jido D

    2005年, Nucl.Phys.A, 755, 491

    [査読あり]

  • eta-mesic nuclei in chiral models

    Nagahiro H, Jido D, Hirenzaki S

    2004年, Prog.Theor.Phys.Suppl., 153, 340

    [査読あり]

  • Medium effects to the N(1535) resonance and eta mesic nuclei

    Jido D, Nagahiro H, Hirenzaki S

    2003年11月, Nucl.Phys.A, 721, 665

    [査読あり]

  • Formation of σ mesic nuclei in (d, t) and (d, 3He) reactions

    S. Hirenzaki, H. Nagahiro, T. Hatsuda, T. Kunihiro

    2002年, Nuclear Physics A, 710 (1-2), 131 - 144, 英語

    [査読あり]

  • Physics of mesic atoms and mesic nuclei -structure and formation-

    S. Hirenzaki, T. Hatsuda, K. Kume, T. Kunihiro, H. Nagahiro, Y. Okumura, E. Oset, A. Ramos, H. Toki, Y. Umemoto

    2000年, Nuclear Physics A, 663-664 (1-2), 553c-556c, 英語

    [査読あり]

  • Eta-Prime Bound States in Nuclei and Partial Restoration of Chiral Symmetry

    Hirenzaki Satoru, Jido Daisuke, Nagahiro Hideko

    14th International Conference on Hadron Spectroscopy

    [査読あり]

MISC

  • Spectroscopy of Pionic Atoms in Sn 122 (d, He 3) Reaction and Angular Dependence of the Formation Cross Sections

    Nishi, T., Itahashi, K., Berg, G.P.A., Fujioka, H., Fukuda, N., Fukunishi, N., Geissel, H., Hayano, R.S., Hirenzaki, S., Ichikawa, K., Ikeno, N., Inabe, N., Itoh, S., Iwasaki, M., Kameda, D., Kawase, S., Kubo, T., Kusaka, K., Matsubara, H., Michimasa, S., Miki, K., Mishima, G., Miya, H., Nagahiro, H., Nakamura, M., Noji, S., Okochi, K., Ota, S., Sakamoto, N., Suzuki, K., Takeda, H., Tanaka, Y.K., Todoroki, K., Tsukada, K., Uesaka, T., Watanabe, Y.N., Weick, H., Yamakami, H., Yoshida, K.

    2018年, Physical Review Letters, 120 (15), 英語

  • Charmed baryons and their interactions

    永廣秀子

    2016年01月, 英語

  • Spectroscopy of eta'-nucleus bound states at GSI and FAIR - very preliminary results and future prospects

    H. Fujioka, Y. Ayyad, J. Benlliure, K. -T. Brinkmann, S. Friedrich, H. Geissel, J. Gellanki, C. Guo, E. Gutz, E. Haettner, M. N. Harakeh, R. S. Hayano, Y. Higashi, S. Hirenzaki, C. Hornung, Y. Igarashi, N. Ikeno, K. Itahashi, M. Iwasaki, D. Jido, N. Kalantar-Nayestanaki, R. Kanungo, R. Knoebel, N. Kurz, V. Metag, I. Mukha, T. Nagae, H. Nagahiro, M. Nanova, T. Nishi, H. J. Ong, S. Pietri, A. Prochazka, C. Rappold, M. P. Reiter, J. L. Rodriguez-Sanchez, C. Scheidenberger, H. Simon, B. Sitar, P. Strmen, B. Sun, K. Suzuki, I. Szarka, M. Takechi, Y. K. Tanaka, I. Tanihata, S. Terashima, Y. N. Watanabe, H. Weick, E. Widmann, J. S. Winfield, X. Xu, H. Yamakami, J. Zhao

    The possible existence of eta'-nucleus bound states has been put forward through theoretical and experimental studies. It is strongly related to the eta' mass at finite density, which is expected to be reduced because of the interplay between the U (A) (1) anomaly and partial restoration of chiral symmetry. The investigation of the C(p,d) reaction at GSI and FAIR, as well as an overview of the experimental program at GSI and future plans at FAIR are discussed., 2015年08月, HYPERFINE INTERACTIONS, 234 (1-3), 33 - 39, 英語

  • (p,d)反応の分光によるη′中間子原子核の探索

    田中良樹, AYYAD Y, BENLLIURE J, BRINKMANN K.‐T, FRIEDRICH S, 藤岡宏之, GEISSEL H, GEISSEL H, GELLANKI J, GUO C, GUTZ E, HAETTNER E, HARAKEH M.N, 早野龍五, 東裕子, 比連崎悟, HORNUNG C, 五十嵐洋一, 池野なつ美, 池野なつ美, 板橋健太, 岩崎雅彦, 慈道大介, KALANTAR‐NAYESTANAKI N, KANUNGO R, KNOEBEL R, KNOEBEL R, KURZ N, METAG V, MUKHA I, 永江知文, 永廣秀子, NANOVA M, 西隆博, ONG H.J, PIETRI S, PROCHAZKA A, RAPPOLD C, REITER M.P, SANCHEZ J.L.R

    2015年03月, 日本物理学会講演概要集(CD-ROM), 70 (1), ROMBUNNO.21PCC-1, 日本語

  • Search for η′(958)-nucleus bound states by (p, d) reaction at GSI and FAIR

    Fujioka, H., Ayyad, Y., Benlliure, J., Brinkmann, K.-T., Friedrich, S., Geissel, H., Gellanki, J., Guo, C., Gutz, E., Haettner, E., Harakeh, M.N., Hayano, R.S., Higashi, Y., Hirenzaki, S., Hornung, C., Igarashi, Y., Ikeno, N., Itahashi, K., Iwasaki, M., Jido, D., Kalantar-Nayestanaki, N., Kanungo, R., Knoebel, R., Kurz, N., Metag, V., Mukha, I., Nagae, T., Nagahiro, H., Nanova, M., Nishi, T., Ong, H.J., Pietri, S., Prochazka, A., Rappold, C., Reiter, M.P., Rodríguez-Sánchez, J.L., Scheidenberger, C., Simon, H., Sitar, B., Strmen, P., Sun, B., Suzuki, K., Szarka, I., Takechi, M., Tanaka, Y.K., Tanihata, I., Terashima, S., Watanabe, Y.N., Weick, H., Widmann, E., Winfield, J.S., Xu, X., Yamakami, H., Zhao, J.

    2015年, Acta Physica Polonica B, 46 (1), 127, 英語

  • MESON PROPERTIES AT FINITE DENSITY FROM MESIC ATOMS AND MESIC NUCLEI

    Satoru Hirenzaki, Hideko Nagahiro

    The properties of eta'(958) meson at finite nuclear density is considered to have close connection with the effects of U-A(1) anomaly at finite density. In this context, we are very much interested in the study of the eta'(958)mesic nuclei. As for the eta-mesic nuclei, which have been studied for a long time, we think it is interesting and important to consider both effects of the coupling of eta N system to N*(1535) and of the mixing of eta with eta'(958). In this article, we briefly summarize recent results of our studies concerning with eta'(958)- and eta-mesic nuclei., 2014年03月, ACTA PHYSICA POLONICA B, 45 (3), 619 - 625, 英語

  • Nstar's and Delta's generated in vector, pseudoscalar meson-baryon systems

    永廣秀子

    2014年01月, 26, 1460060, 英語

  • Missing Mass Spectroscopy of eta ' Mesic Nuclei with the (p,d) Reaction at GSI

    Yoshiki K. Tanaka, Kai-Thomas Brinkmann, Stefan Friedrich, Hiroyuki Fujioka, Hans Geissel, Ryugo S. Hayano, Satoru Hirenzaki, Kenta Itahashi, Satoshi Itoh, Daisuke Jido, Volker Metag, Hideko Nagahiro, Mariana Nanova, Takahiro Nishi, Kota Okochi, Haruhiko Outa, Ken Suzuki, Takatoshi Suzuki, Yuni N. Watanabe, Helmut Weick

    We plan a missing-mass spectroscopy experiment of eta' mesic nuclei with the C-12(p,d)eta'circle times C-11 reaction to study in-medium properties of the eta' meson. In nuclear medium, due to restoration of chiral symmetry, the mass of the eta' meson may be reduced, and 71 bound states in a nucleus may exist. The experiment will be started at GSI with a 2.5 GeV proton beam using FRS as a spectrometer and will be continued at Super-FRS at FAIR. The plan of the experiment and development of a Cherenkov detector and an optics mode are described., 2014年, INPC 2013 - INTERNATIONAL NUCLEAR PHYSICS CONFERENCE, VOL. 2, 66, 09019, 英語

  • Spectroscopy of eta ' Mesic Nuclei via Semi-Exclusive Measurement at FAIR

    Hiroyuki Fujioka, Kai-Thomas Brinkmann, Stefan Friedrich, Hans Geissel, Ryugo S. Hayano, Satoru Hirenzaki, Kenta Itahashi, Satoshi Itoh, Daisuke Jido, Volker Metag, Hideko Nagahiro, Mariana Nanova, Takahiro Nishi, Kota Okochi, Haruhiko Outa, Ken Suzuki, Takatoshi Suzuki, Yoshiki K. Tanaka, Yuni N. Watanabe, Helmut Weick

    In order to investigate a possible mass reduction of an eta' meson at finite density, a series of missing-mass spectroscopy experiments of rl-nucleus bound states with the C-12(p,d) reaction is planned at GSI and FAIR. A semi-exclusive measurement with the tagging of protons from eta' two-body absorption (eta'NN -> NN) will be a key feature in an experiment with Super-FRS at FAIR., 2014年, INPC 2013 - INTERNATIONAL NUCLEAR PHYSICS CONFERENCE, VOL. 2, 66, 09006, 英語

  • Formation of Deeply Bound Pionic Atoms in the (d,3He) Reaction

    永廣秀子

    2014年, 1, 013060, 英語

  • Formation of eta'(958) Bound States in Nuclei

    永廣秀子

    2014年, 1, 013030, 英語

  • Formation of eta'(958) Meson Bound States and Chiral Symmetry In-Medium

    Hideko Nagahiro

    We theoretically discuss the feasibility to observe the eta'(958)-mesic nuclei by using the missing mass spectroscopy. We evaluate the eta'-nucleus optical potential including the contribution of lowest order in density together with the second order terms account for eta' absorption by two nucleons, based on a recent model of the eta'N interaction. We show the calculated formation cross section of the eta' bound states from (pi, N) reaction with pion beam momentum p (pi) = 1.8 GeV/c and (p, d) reaction with proton kinetic energy T (p) = 2.5 GeV., 2013年08月, FEW-BODY SYSTEMS, 54 (7-10), 1565 - 1568, 英語

  • Formation of Deeply Bound Pionic Atoms in Sn Isotopes

    Natsumi Ikeno, Hideko Nagahiro, Satoru Hirenzaki

    We study the formation of deeply bound pionic atoms in the (d,He-3) reaction theoretically. At different scattering angles, we find that the different subcomponents dominate the formation spectra because of the matching condition of the reaction. We also find that the pionic 1s state which is free from the residual interaction effects appears clearly in Sn-117(d, He-3) spectra. We conclude that the observation of the (d,He-3) reaction for these new cases will provide more systematic and accurate information on the pionic bound states, and it will help to develop the study of the pion properties and the partial restoration of chiral symmetry in nuclei., 2013年08月, FEW-BODY SYSTEMS, 54 (7-10), 1573 - 1576, 英語

  • Spectroscopy of eta' Mesic Nuclei with (p, d) Reaction

    Yoshiki K. Tanaka, Stefan Friedrich, Hiroyuki Fujioka, Hans Geissel, Ryugo S. Hayano, Satoru Hirenzaki, Kenta Itahashi, Satoshi Itoh, Daisuke Jido, Volker Metag, Hideko Nagahiro, Mariana Nanova, Takahiro Nishi, Kota Okochi, Haruhiko Outa, Ken Suzuki, Takatoshi Suzuki, Helmut Weick

    We are going to perform an inclusive spectroscopy experiment of eta' mesic nuclei with the C-12(p,d) reaction to study in-medium properties of the eta' meson. In nuclear medium, the eta' meson mass may be reduced due to partial restoration of chiral symmetry. In case of sufficiently large mass reduction and small absorption width of eta' at normal nuclear density, peak structures of eta' mesic states in C-11 will be observed near the eta' emission threshold even in an inclusive spectrum. The experiment will be carried out at GSI with proton beam supplied by SIS using FRS as a spectrometer. The detail of the experiment is described., 2013年08月, FEW-BODY SYSTEMS, 54 (7-10), 1263 - 1266, 英語

  • Dynamically Generated Resonances from Two Vectors in the Charm Sector and their Decays

    R. Molina, H. Nagahiro, A. Hosaka, T. Branz, E. Oset

    In this talk we study dynamically generated resonances from two-vector mesons within the hidden gauge formalism in a coupled channel unitary approach. We focus on the sectors with charm and/or strangeness and double charm, being some of them flavor exotic. Concretely, by looking for poles in the complex plane, we get three poles in the T-matrix around 2,460, 2,640 and 2,572 MeV that we identify with the and , coupling strongly to D*rho (the first two) and D*K* respectively. In addition, we obtain resonances in other exotic sectors such as (charm = 1; strangeness = -1), (charm = 2; strangeness = 0, 1). This 'flavor-exotic' states are interpreted as and molecular states and have not been observed yet. The observation of these peculiar states is a challenge for the experimentalist., 2013年08月, FEW-BODY SYSTEMS, 54 (7-10), 1259 - 1262, 英語

  • Vector- and Pseudoscalar-baryon coupled channel systems

    K. P. Khemchandani, A. Martinez Torres, H. Kaneko, H. Nagahiro, A. Hosaka

    In this manuscript, I will report the details of our recent work on the vector meson-baryon (VB) interaction, which we studied with the motivation of finding dynamical generation of resonances in the corresponding systems. We started our study by building a formalism based on the hidden local symmetry and calculating the leading order contributions to the scattering equations by summing the diagrams with: (a) a vector meson exchange in the t-channel (b) an octet baryon exchange in the s-, u-channels and (c) a contact interaction arising from the part of the vector meson-baryon Lagrangian which is related to the anomalous magnetic moment of the baryons. We find the contribution from all these sources, except the s-channel, to be important. The amplitudes obtained by solving the coupled channel Bethe-Salpeter equations for the systems with total strangeness zero, show generation of one isospin 3/2, spin 1/2 resonance and three isospin 1/2 resonances: two with spin 3/2 and one with spin 1/2. We identify these resonances with Delta (1900) S-31, N* (2080) D-13, N* (1700) D-13, and N* (2090) S-11, respectively. We have further extended our study by including pseudoscalar meson-baryon (PB) as the coupled channels of VB systems. For this, we obtain the PB -> VB amplitudes by using the Kroll-Ruddermann term where, considering the vector meson dominance phenomena, the photon is replaced by a vector meson. The calculations done within this formalism reveal a very strong coupling of the VB channels to the low-lying resonances like Lambda (1405) and Lambda (1670), which can have important implications on certain reactions producing them. In addition to this, we find that the effect of coupling the higher mass states to the lighter channels is not restricted to increasing the width of those states, it can be far more strong., 2012年, 5TH DAE-BRNS WORKSHOP ON HADRON PHYSICS (HADRON 2011), 374, 012007, 英語

  • A THEORETICAL MODEL FOR FORMATION OF eta-He-4 BOUND STATE BY d plus d REACTION

    Satoru Hirenzaki, Hideko Nagahiro, Daisuke Jido

    In this article, we consider theoretically the d+d reaction for the formation of the eta-He-4 bound state. We evaluate the formation rate and show expected spectra using a simple theoretical model with Green's function method., 2011年02月, INTERNATIONAL JOURNAL OF MODERN PHYSICS A, 26 (3-4), 444 - 449, 英語

  • The structure of baryons. Proceedings, 12th International Conference, Baryons'10,

    永廣秀子

    2011年, 1388, 英語

  • FORMATION OF eta-MESIC NUCLEI

    Satoru Hirenzaki, Hideko Nagahiro, Daisuke Jido

    In this paper, we briefly introduce the interests and the recent research activities on the eta-mesic nuclei. We also mention the activities on the eta'(958)-mesic nucleus formation., 2010年10月, ACTA PHYSICA POLONICA B, 41 (10), 2211 - 2220, 英語

  • Coupled-channel analysis for phi photoproduction with Lambda(1520) (vol 80, 035201, 2009)

    S. Ozaki, A. Hosaka, H. Nagahiro, O. Scholten

    2010年05月, PHYSICAL REVIEW C, 81 (5), 英語

  • Hadron and nuclear physics 09: Osaka University, Japan, 16-19 November 2009

    Atsushi Hosaka, Takayuki Myo, Hideko Nagahiro, Kanabu Nawa

    © 2010 by World Scientific Publishing Co. Pte. Ltd. All rights reserved. This volume collects papers presented at the international workshop "Hadron-Nuclear Physics 09" held at Osaka, November 16-19, 2009. The series of this workshop has provided opportunities to discuss common interests of hadron and nuclear physics. Hadrons and nuclei show up different layers of phenomena governed by the same dynamics dictated by the fundamental law of the strong interaction, Quantum Chromodynamics (QCD). The basic building blocks of matter, quarks and gluons, are confined in hadrons, generating their masses dynamically and breaking chiral symmetry spontaneously. The latter is the origin of the presence of the pion which governs the essential part of the nuclear interaction. Therefore, the common key words are chiral symmetry and pions. This volume contains reports of current achievements in hadron physics including exotic multiquark states, meson production reactions and non-linear dynamics of hadrons, and those in nuclear physics clustering phenomena, exotic neutron rich nuclei and the pions in nuclei. As related subjects, applications to astronuclear physics, including accelerator physics and laser physics are also discussed comprehensively., 2010年01月, Hadron and Nuclear Physics 09: Osaka University, Japan, 16-19 November 2009, 1 - 407

  • Scalar, axial-vector and tensor resonances from the rho D*, omega D* interaction in the hidden gauge formalism

    R. Molina, H. Nagahiro, A. Hosaka, E. Oset

    We apply a unitary approach together with a set of hidden-gauge Lagrangians to study the vector-vector interaction. We study the case of the p(omega)D* interaction within the model. In I = 1/2 we get strong enough attraction to bind the system. Concretely, we get one resonance for each spin J = 0,1,2. For J = 1 and 2 these resonances can be easily identified with the D* (2460) and D* (2640). Whereas the state for J = 0 with mass M similar to 2600 MeV is a prediction of the model. In I = 3/2 we get a repulsive interaction and hence no exotic dynamically generated states., 2010年, HADRON 2009, 1257, 447 - +, 英語

  • Formation of eta Mesic Nuclei at JPARC And COSY

    Satoru Hirenzaki, Hideko Nagahiro, Daisuke Jido

    In this article, we consider theoretically the formation reactions of the eta mesic nuclei at JPARC and COSY., 2010年, INTERNATIONAL WORKSHOP ON CHIRAL SYMMETRY IN HADRONS AND NUCLEI, 1322, 28 - +, 英語

  • Hadron and Nuclear Physics 09, Proceedings of International Workshop on Hadron and Nuclear Physics, "HNP09"

    永廣秀子

    2010年, 英語

  • FORMATION OF eta-MESIC NUCLEI BY (pi, N) REACTION AND CHIRAL SYMMETRY FOR BARYONS

    Hideko Nagahiro, Daisuke Jido, Satoru Hirenzaki

    We calculate formation spectra of eta-nucleus systems in (pi, N) reactions with nuclear targets, which can be performed at existing and/or forthcoming facilities, including J-PARC, in order to investigate eta-nucleus interactions. Based on the N*(1535) dominance in the eta N system, eta-mesic nuclei are suitable systems for study of in-medium properties of the N* (1535) baryon resonance, such as reduction of the mass difference of N and N* in nuclear medium, which affects level structure of the eta and N*-hole modes. We find that clear information on the in-medium N*- and eta-nucleus interactions can be obtained through the formation spectra of the eta-mesic nuclei., 2009年11月, INTERNATIONAL JOURNAL OF MODERN PHYSICS E-NUCLEAR PHYSICS, 18 (10), 2202 - 2206, 英語

  • Photo- and electro-production of mesons on nucleons and nuclei

    E. Oset, M. Doering, D. Strottman, D. Jido, M. Napsuciale, K. Sasaki, C. A. Vaquera-Araujo, M. Kaskulov, E. Hernandez, H. Nagahiro, S. Hirenzaki

    In these lectures I will show some results obtained with the chiral unitary approach applied to the photo- and electro-production of mesons. The results for the photo-production of eta pi(0)p and K-0 pi(0)Sigma(+), together with related reactions will be shown, having with common denominator the excitation of the Delta(1700) resonance which is one of those dynamically generated in the chiral unitary approach. Then I will show the results obtained for the e(+)e(-) -> phi f(0)(980) reaction which reproduce the bulk of the data except for a pronounced peak, giving support to a new mesonic resonance, X(2175). Results will also be shown for the electromagnetic form factors of the N* (1535) resonance, also dynamically generated in this approach. Finally, I will show some results on the photo-production of the omega in the nuclei, showing that present experimental results claiming a shift of the omega mass in the medium are tied to a particular choice of background and are not conclusive. On the other hand, the same experimental results show unambiguously a huge increase of the omega width in the nuclear medium. (c) 2007 Elsevier B.V. All fights reserved., 2008年, PROGRESS IN PARTICLE AND NUCLEAR PHYSICS, VOL 61, NO 1, 61 (1), 260 - 275, 英語

  • Chiral symmetry in hadron and nuclear physics. Proceedings, International Workshop, CHIRAL07, Osaka, Japan, November 13-16, 2007.

    永廣秀子, 保坂淳他

    2008年, 23, 2201-2623, 英語

  • Formation of kaonic atoms and kaonic nuclei in in-flight (K-, p) reactions (vol 114, pg 301, 2005)

    J Yamagata, H Nagahiro, Y Okumura, S Hirenzaki

    2005年10月, PROGRESS OF THEORETICAL PHYSICS, 114 (4), 905 - 905, 英語

  • η-Nucleus interactions and in-medium properties of N*(1535) in chiral models (共著)

    NAGAHIRO H, JIDO D, HIRENZAKI S

    2003年, Physical Review, 68 (3), 1 - 35205

  • Medium effects to the N(1535) resonance and eta mesic nuclei (共著)

    JIDO D, NAGAHIRO H, HIRENZAKI S

    2002年, Physical Review, 66 (4), 1 - 45202

講演・口頭発表等

  • Structure of charmed baryons studied by pionic decays

    永廣秀子

    2017年03月, 英語, 国際会議

    口頭発表(一般)

  • Effect of the final state interaction of eta'N on the eta' photoproduction off nucleon

    永廣秀子, 酒井俊太郎, 保坂淳

    第72回日本物理学会年次大会, 2017年03月, 日本語, 国内会議

    口頭発表(一般)

  • Structure of charmed baryons studied by pionic decays

    永廣秀子

    2016年10月, 英語, 国際会議

    口頭発表(一般)

  • チャームバリオン励起状態の構造とパイオン放出に崩壊

    永廣秀子, 安井繁宏, 野海博之, 保坂淳, 岡真

    日本物理学会, 2016年09月, 日本語, 国内会議

    口頭発表(一般)

  • Decays of charmed baryons through pion emission in the quark model

    永廣秀子

    2016年08月, 英語, 国際会議

    口頭発表(一般)

  • Decays of charmed baryons through pion emission in the quark model

    永廣秀子

    2016年07月, 英語, 国際会議

    口頭発表(一般)

  • Formation of possible eta'(958)-nucleus bound states and eta'N interaction

    永廣秀子

    2016年07月, 英語, 国際会議

    口頭発表(一般)

  • Decays of charmed baryons through pion emission in the quark model

    永廣秀子, 安井繁宏, 吉田哲也, 野海博之, 保坂淳, 岡真

    日本物理学会 第71回年次大会, 2016年03月, 日本語, 国内会議

    口頭発表(一般)

  • Decays of charmed baryons through pion emission in the quark modek

    永廣秀子

    2016年02月, 英語, 国際会議

    口頭発表(一般)

  • チャームバリオンの崩壊/Mesic nuclei by missing mass specroscopy

    永廣秀子

    二国間交流事業共同研究/セミナー, 2016年02月, 日本語, 国内会議

    口頭発表(一般)

  • 結合チャネル計算によるeta'(958)核子相互作用

    永廣秀子

    原子核媒質中のハドロン研究 III, 2015年10月, 日本語, 国内会議

    口頭発表(一般)

  • クォーク模型によるチャームバリオンの崩壊 --パイオン放出過程-

    永廣秀子, 安井繁宏, 吉田哲也, 野海博之, 保坂淳, 岡真

    日本物理学会 2015年秋季大会, 2015年09月, 日本語, 国内会議

    口頭発表(一般)

  • eta'(958)-nucleon interaction and possible bound state of eta'N system

    永廣秀子

    2015年06月, 英語, 国際会議

    口頭発表(一般)

  • Hadron properties at finite density and specroscopies of mesic nuclei

    永廣秀子

    2015年03月, 英語, 国際会議

    口頭発表(一般)

  • Elementarity of composite systems

    永廣秀子

    2015年03月, 英語, 国際会議

    口頭発表(一般)

  • Study for the elementarity of composite systems

    永廣秀子

    2014年10月, 英語, 国際会議

    口頭発表(一般)

  • Formation of eta'(958) mesic nuclei by (p,d) reaction

    永廣秀子

    2014年09月, 英語, 国際会議

    口頭発表(一般)

  • Do elementary particle survive composite systems ?

    永廣秀子

    2014年06月, 英語, 国際会議

    口頭発表(一般)

  • Composite and elementary natures of hadron resonances

    永廣秀子

    2014年01月, 英語, 国際会議

    口頭発表(一般)

  • eta'(958)-nucleus bound states and their formations by missing mass spectroscopies

    永廣秀子

    2013年11月, 英語, 国際会議

    口頭発表(一般)

  • eta'(958) mesic nuclei by (p,d) reaction

    永廣秀子

    2013年06月, 英語, 国際会議

    口頭発表(一般)

  • Study of mixing properties of mesonic resonances

    永廣秀子, 保坂淳

    第68回日本物理学会年次大会, 2013年03月, 日本語, 広島大学東広島キャンパス, 国内会議

    口頭発表(一般)

  • Formation of eta'(958) nucleus bound state

    永廣秀子

    ELPH研究会ダブルメソン生成とバリオン分光, 2012年11月, 日本語, 東北大学電子光理学研究センター, 宮城県仙台市東北大学, 国内会議

    口頭発表(一般)

  • Formation of the eta'(958)-mesic nuclei in missing mass specroscopies

    永廣秀子

    2012年10月, 英語, 国際会議

    口頭発表(一般)

  • Formation of eta'(958) mesic nuclei by missing mass spectroscopy

    永廣秀子

    2012年10月, 英語, ドイツ・ミュンヘン, 国際会議

    口頭発表(一般)

  • Formation of eta'(958) mesic nuclei by the (p,d) reaction at GSI

    永廣秀子

    2012年09月, 英語, ダルムシュタット、ドイツ, 国際会議

    口頭発表(一般)

  • Formation of the eta'(958) meson bound states and chiral symmetry in-meidum

    永廣秀子

    2012年08月, 英語, 福岡市国際会議場, 国際会議

    口頭発表(一般)

  • Composite and elementary natures of mesonic resonances

    永廣秀子

    新学術領域「素核宇宙融合」×「新ハドロン」クロスオーバー研究会--多彩な手法でせまるハドロン物理への挑戦--, 2012年07月, 日本語, 名古屋大学, 国内会議

    口頭発表(一般)

  • eta'(958)中間子に対する二核子吸収の評価とeta'中間子原子核生成

    永廣秀子

    第67回日本物理学会年次大会, 2012年03月, 日本語, 国内会議

    口頭発表(一般)

  • Formation spectra of eta' mesic nuclei by the (p,d) reaction

    永廣秀子

    2012年02月, 英語, 国際会議

    口頭発表(一般)

  • Formation of eta'(958) meson bound states in nuclei at J-PARC

    永廣秀子

    2012年02月, 英語, 国際会議

    口頭発表(一般)

  • eta'(958) meson bound states and their formations

    永廣秀子

    2012年02月, 英語, 国際会議

    口頭発表(一般)

  • Composite and elementary natures of hadrons -- Study of mixing properties of a1(1260) --

    永廣秀子

    2011年06月, 英語, 国際会議

    口頭発表(一般)

担当経験のある科目(授業)

  • パサージュ(22B) (奈良女子大学)

  • パサージュ(22A) (奈良女子大学)

  • ハドロン物理学演習 (奈良女子大学)

  • 数物特別セミナーB (奈良女子大学)

  • 力学1 (奈良女子大学)

  • ハドロン物理学 (奈良女子大学)

  • 数物特別セミナーA (奈良女子大学)

  • 計算機処理演習 (奈良女子大学)

  • 計算機処理 (奈良女子大学)

  • 応用複素解析演習 (奈良女子大学)

  • 力学演習 (奈良女子大学)

  • 力学1演習 (奈良女子大学)

  • 原子核理論セミナー (奈良女子大学)

  • 原子核物理学特論 (奈良女子大学)

  • シミュレーション物理 (奈良女子大学)

  • 力学1演習 (奈良女子大学)

  • 計算機物理 (奈良女子大学)

所属学協会

  • 日本物理学会

共同研究・競争的資金等の研究課題

  • イータ(958)中間子原子核生成と有限密度中におけるUA(1)量子異常

  • イータ中間子原子核生成と有限密度中におけるカイラル対称性回復

  • ハドロン共鳴にみるエキゾチック構造

  • eta'(958)mesic nuclei formation and UA(1) anomaly in medium

  • eta mesic nuclei and partial restoration of chiral symmetry

  • composite and elementary component of hadronic resonance



Copyright © MEDIA FUSION Co.,Ltd. All rights reserved.