in-medium effect for hadrons and symmetries of QCD

• Project/Area Number: 17K05443
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Nara Women's University
• Principal Investigator: Nagahiro Hideko 奈良女子大学, 自然科学系, 准教授 (10397838)
• Project Period (FY): 2017-04-01 – 2020-03-31
• Project Status: Completed (Fiscal Year 2019)
• Budget Amount: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000); Fiscal Year 2019: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2018: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
• Keywords: 中間原子核 / 中間子原子核 / 有限密度効果 / 理論核物理 / 量子異常

Outline of Final Research Achievements

We investigate the formation of the eta-prime(958)-nucleus bound state to know the properties of the eta-prime meson. The eta-prime meson has a huge mass compared with other pseudo-scalar meson which is known as UA(1) anomaly.
We focus the in-medium change of the properties of the eta-prime meson and the interaction between eta-prime and nucleon and try to evaluate the effect of the partial restoration of chiral symmetry to the eta-prime system. We try to identify the possible coupled-channels to the eta-prime-nucleon system, which one can observe as a simultaneous observation at the formation of the eta-prime mesic nuclei to reduce the background in experiments.

Academic Significance and Societal Importance of the Research Achievements

物質の質量の大部分を占めるハドロンの性質は、いまだ明らかになっていない部分が多い。特にハドロン質量の９０％は、その構成粒子であるクォーク由来ではなく、カイラル対称性の自発的破れに伴って生成されるとされているが、この実験的検証は未だ十分ではない。本研究を通して、ハドロンの質量生成機構について明らかにすることができると期待される。

Research Products

• [Journal Article] Non-mesonic decay of the eta-mesic 3He via pd -> (3He-eta)bound -> 3He2gamma(6gamma) reaction (2020)
  • Author(s): M. Skurzok, S. Hirenzaki, S. Kinutani, H. Konishi, P. Moskal, H. Nagahiro, O. Rundel
  • Journal Title: Nuclear Physics A Volume: 993 Pages: 121647-121647
  • DOI: 10.1016/j.nuclphysa.2019.121647
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] A Systematic Study of Charmed Baryon Decays (2019)
  • Author(s): Arifi Ahmad Jafar、Nagahiro Hideko、Hosaka Atsushi
  • Journal Title: JPS Conf.Proc. Volume: 26 Pages: 022031-022031
  • DOI: 10.7566/jpscp.26.022031
  • NAID: 130007509942
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Constraining the optical potential in the search for η-mesic 4He (2018)
  • Author(s): M. Skurzok, P. Moskal, N. G. Kelkar, S. Hirenzaki, H. Nagahiro, N. Ikeno
  • Journal Title: Physics Letters Volume: B782 Pages: 6-12
  • DOI: 10.1016/j.physletb.2018.04.047
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Three-body decay of $\Lambda_c^{*}(2595)$ and $\Lambda_c^{*}(2625)$ with the inclusion of a direct two-pion coupling (2018)
  • Author(s): A.J. Arifi, H. Nagahiro, A. Hosaka
  • Journal Title: Phys.Rev. D Volume: 98 Issue: 11 Pages: 114007-114007
  • DOI: 10.1103/physrevd.98.114007
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Understanding the properties of $\Xi(1690)$ and $\Xi(2120)$ (2018)
  • Author(s): Khemchandani Kanchan、Hosaka A.、Nagahiro H.、Navarra F. S.、Nielsen M.、Mart?nez Torres A.
  • Journal Title: PoS Hadron2017 Volume: 2017 Pages: 056-056
  • DOI: 10.22323/1.310.0056
  • Int'l Joint Research
• [Journal Article] Missing-mass spectroscopy of the 12C(p;d) reaction near the _eta’ emission threshold (2018)
  • Author(s): Y. K. Tanaka, 他
  • Journal Title: Phys. Rev. C Volume: 97 Issue: 1 Pages: 015202-015202
  • DOI: 10.1103/physrevc.97.015202
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Why Xi(1690) and Xi(2120) are so narrow? (2018)
  • Author(s): K.P. Khemchandani, A. Martinez Torres, A. Hosaka, H. Nagahiro, F.S. Navarra, M. Nielsen
  • Journal Title: Physical Review D Volume: 97 Issue: 3
  • DOI: 10.1103/physrevd.97.034005
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Three-Body Decay of Λc*(2595) and Λc*(2625) with consideration of Σc(2455)π and Σc*(2520)π in intermediate States (2017)
  • Author(s): Arifi A.J.、Nagahiro H.、Hosaka A.
  • Journal Title: Physical Review D Volume: 95 Issue: 11 Pages: 114018-114018
  • DOI: 10.1103/physrevd.95.114018
  • Peer Reviewed / Int'l Joint Research
• [Presentation] Formation of eta and eta’-mesic nuclei and chiral symmetry in medium. (2019)
  • Author(s): Hideko Nagahiro
  • Organizer: RCNP研究会「ガンマ線ビームを用いた原子核・ハドロン物理の新局面と今後の展望」
  • Invited
• [Presentation] Charmed baryons studied by pion emission decays (2018)
  • Author(s): Hideko Nagahiro
  • Organizer: 第五回日米物理学会合同核物理分科会
  • Int'l Joint Research / Invited
• [Presentation] Pion emission decays of charmed baryon in the quark model (2018)
  • Author(s): Hideko Nagahiro
  • Organizer: 第１１回ストレンジネス核物理を考える会
  • Invited
• [Presentation] 強いエネルギー依存性をもつη’(958)中間子原子核ポテンシャルと束縛状態 (2017)
  • Author(s): 川本彩乃、永廣秀子、比連崎悟
  • Organizer: 日本物理学会分科会
• [Presentation] Structure of excited charmed baryons studied by pion emission decays (2017)
  • Author(s): Hideko Nagahiro
  • Organizer: XVII International Conference on Hadron Spectroscopy and Structure (Hadron2017)
  • Int'l Joint Research / Invited
• [Presentation] Structure of excited charmed baryons studied by pion emission decays (2017)
  • Author(s): Hideko Nagahiro
  • Organizer: 6th International Conference on New Frontiers in Physics (ICNFP2017)
  • Int'l Joint Research
• [Presentation] Formation of eta'-mesic nuclei for the study of eta'N interaction (2017)
  • Author(s): Hideko Nagahiro
  • Organizer: Reimei Workshop “Hadronic Resonances and Dense Nuclear Matter”
  • Int'l Joint Research