Pion production in heavy-ion collision and high-density asymmetric nuclear matter

• Project/Area Number: 15H06413
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Single-year Grants
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Tottori University
• Principal Investigator: Ikeno Natsumi 鳥取大学, 地域学部, 講師 (30756086)
• Project Period (FY): 2015-08-28 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000); Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
• Keywords: パイ中間子 / 対称エネルギー / 重イオン衝突 / 輸送模型 / 中性子過剰核 / パイ中間子原子 / 理論核物理 / 非対称核物質

Outline of Final Research Achievements

To investigate the nuclear symmetry energy and the partial restoration of chiral symmetry at high density, we have studied the pion production in the intermediate-energy heavy-ion collisions using the transport model that combines antisymmetrized molecular dynamics (AMD) and a hadronic cascade model (JAM). We understood the mechanism how the emitted pions and delta resonances reflect the dynamics of neutrons and protons that is sensitive to the symmetry energy. We also found the effects of cluster correlations as well as of the high-density symmetry energy on the nucleon dynamics and consequently on the pion ratios.

Research Products

• [Journal Article] Formation of Deeply Bound Pionic Atoms and Pion Properties in Nuclei (2017)
  • Author(s): N. Ikeno, J. Yamagata-Sekihara, H. Nagahiro, and S. Hirenzaki
  • Journal Title: JPS Conf. Proc. Volume: 13
  • DOI: 10.7566/jpscp.13.020016
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Probing neutron-proton dynamics by pions (2016)
  • Author(s): Natsumi Ikeno, Akira Ono, Yasushi Nara, Akira Ohnishi
  • Journal Title: Physical Review C Volume: 93 Issue: 4
  • DOI: 10.1103/physrevc.93.044612
  • NAID: 120006496958
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Formation of η’(958) meson bound states by the 6Li(γ,d) reaction (2016)
  • Author(s): M. Miyatani, N. Ikeno, H. Nagahiro, and S. Hirenzaki
  • Journal Title: European Physical Journal A Volume: 52 Issue: 7 Pages: 193-202
  • DOI: 10.1140/epja/i2016-16193-y
  • Peer Reviewed / Acknowledgement Compliant
• [Presentation] Production of pions and clusters in HIC by AMD+JAM approach (2017)
  • Author(s): Natsumi Ikeno
  • Organizer: Transport 2017: International Workshop on Transport Simulations for Heavy Ion Collisions under Controlled Conditions
  • Place of Presentation: FRIB-MSU, East Lansing, Michigan, USA
  • Year and Date: 2017-03-27
  • Int'l Joint Research
• [Presentation] Production of pions and clusters in heavy-ion collisions by the AMD+JAM approach (2016)
  • Author(s): Natsumi Ikeno
  • Organizer: International Symposium on Neutron Star Matter (NSMAT2016)
  • Place of Presentation: Tohoku University, Sendai, Japan
  • Year and Date: 2016-11-21
  • Int'l Joint Research
• [Presentation] π-/π+ ratio in asymmetric heavy-ion collisions (2016)
  • Author(s): Natsumi Ikeno
  • Organizer: NPCSM 2016: YIPQS long-term and Nishinomiya-Yukawa memorial workshop on "Nuclear Physics, Compact Stars, and Compact Star Mergers 2016"
  • Place of Presentation: YITP, Kyoto, Japan
  • Year and Date: 2016-10-17
  • Int'l Joint Research
• [Presentation] Structure and Formation of deeply bound pionic atoms (2016)
  • Author(s): Natsumi Ikeno
  • Organizer: YITP workshop MIN2016 Meson in Nucleus
  • Place of Presentation: YITP, Kyoto, Japan
  • Year and Date: 2016-07-31
  • Int'l Joint Research
• [Presentation] Formation of deeply bound pionic atoms and pion properties in nuclei (2016)
  • Author(s): Natsumi Ikeno
  • Organizer: The 14th International Conference on Meson‐Nucleon Physics and the Structure of the Nucleon (MENU2016)
  • Place of Presentation: Kyoto University, Kyoto, Japan
  • Year and Date: 2016-07-25
  • Int'l Joint Research
• [Presentation] Pion production in heavy-ion collision by the AMD+JAM approach (2016)
  • Author(s): Natsumi Ikeno
  • Organizer: The 6th International Symposium on Nuclear Symmetry (NuSYM2016)
  • Place of Presentation: Tsinghua University, Beijing, China
  • Year and Date: 2016-06-13
  • Int'l Joint Research / Invited
• [Presentation] 重イオン衝突における核子のダイナミクスとπ中間子生成 (2016)
  • Author(s): 池野なつ美，小野章，奈良寧，大西明
  • Organizer: 日本物理学会第71回年次大会
  • Place of Presentation: 東北学院大学
  • Year and Date: 2016-03-19
• [Presentation] 重イオン衝突におけるπ中間子生成と非対称核物質の性質 (2015)
  • Author(s): 池野なつ美
  • Organizer: 滞在型研究会＠JPARC「原子核媒質中のハドロン研究 III」
  • Place of Presentation: KEK東海キャンパス
  • Year and Date: 2015-10-17