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2023 Fiscal Year Annual Research Report

Diversity of nuclear matter properties in heavy-ion collisions and Equation of State of asymmetric nuclear matter

Research Project

Project/Area Number 19K14709
Research InstitutionTottori University

Principal Investigator

池野 なつ美  鳥取大学, 農学部, 講師 (30756086)

Project Period (FY) 2019-04-01 – 2024-03-31
Keywords重イオン衝突 / π中間子 / Δ共鳴 / 輸送模型 / 核物質中の状態方程式
Outline of Annual Research Achievements

本研究では、微視的な輸送模型を用いて低中エネルギー領域における重イオン衝突を計算することにより、高密度非対称核物質における状態方程式(対称エネルギーの密度依存性)の情報を引き出すことを目的としている。また、重イオン衝突では、各時刻で温度や密度が異なる多彩な核物質となるため、様々な状況下で核子系や中間子の現象・性質を理解することも目指している。本年度は、π中間子やΔ共鳴のポテンシャルの影響を正しく取り入れるように改良した輸送模型(AMD+sJAM)を用いて、中性子と陽子のポテンシャルの運動量依存性が重イオン衝突で生成される荷電π中間子比に与える影響を詳細に調べた。核子の平均場ポテンシャルの運動量依存性は、重イオン衝突におけるΔ共鳴やπ中間子生成を決定する重要な因子であり、特に中性子過剰な系では、中性子と陽子のポテンシャルが異なる運動量依存性を持つ可能性があるため、運動量依存性を注意深く取り扱う必要がある。二体衝突過程(NN→NΔ)やΔ共鳴の崩壊過程(Δ→πN)の衝突項において、厳密なエネルギー運動量の保存のもとで計算し、閾値効果だけでなく、二体衝突の生成断面積にも自然な形で考慮した。その結果、陽子・中性子のポテンシャルの運動量依存性は、高密度対称エネルギーやΔ共鳴のポテンシャルのアイソベクトル部分よりも、π中間子生成に大きな影響を与えることが明らかになった。さらに、π中間子のポテンシャルが重イオン衝突で生成されるπ中間子生成に与える影響も理解できつつある。理研でのSn+Snの重イオン衝突実験の荷電π中間子生成データを再現できるようになり、重イオン衝突での核子系やπ中間子の生成ダイナミクスについて理解が進んだ。

  • Research Products

    (17 results)

All 2024 2023 Other

All Int'l Joint Research (5 results) Journal Article (6 results) (of which Int'l Joint Research: 5 results,  Peer Reviewed: 6 results,  Open Access: 2 results) Presentation (6 results) (of which Int'l Joint Research: 5 results,  Invited: 1 results)

  • [Int'l Joint Research] Valencia University(スペイン)

    • Country Name
      SPAIN
    • Counterpart Institution
      Valencia University
  • [Int'l Joint Research] Texas A&M University/Michigan State University(米国)

    • Country Name
      U.S.A.
    • Counterpart Institution
      Texas A&M University/Michigan State University
  • [Int'l Joint Research] Universidad Nacional Autonoma de Mexico(メキシコ)

    • Country Name
      MEXICO
    • Counterpart Institution
      Universidad Nacional Autonoma de Mexico
  • [Int'l Joint Research] Bahia University(ブラジル)

    • Country Name
      BRAZIL
    • Counterpart Institution
      Bahia University
  • [Int'l Joint Research] Guangxi Normal University(中国)

    • Country Name
      CHINA
    • Counterpart Institution
      Guangxi Normal University
  • [Journal Article] Dense nuclear matter equation of state from heavy-ion collisions2024

    • Author(s)
      Sorensen Agnieszka、Agarwal Kshitij、Brown Kyle W.、Chajcki Zbigniew、Danielewicz Pawel、Drischler Christian、Gandolfi Stefano、Holt Jeremy W.、Kaminski Matthias、Ko Che-Ming、Kumar Rohit、Li Bao-An、Lynch William G.、McIntosh Alan B.、Newton William G.、...、 Ikeno N. et al
    • Journal Title

      Progress in Particle and Nuclear Physics

      Volume: 134 Pages: 104080~104080

    • DOI

      10.1016/j.ppnp.2023.104080

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Molecular nature of the Ωc(3120) and its analogy with the Ω(2012)2024

    • Author(s)
      Ikeno Natsumi、Liang Wei-Hong、Oset Eulogio
    • Journal Title

      Physical Review D

      Volume: 109 Pages: 054023-054023

    • DOI

      10.1103/PhysRevD.109.054023

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Collision integral with momentum-dependent potentials and its impact on pion production in heavy-ion collisions2023

    • Author(s)
      Ikeno Natsumi、Ono Akira
    • Journal Title

      Physical Review C

      Volume: 108 Pages: 044601-044601

    • DOI

      10.1103/PhysRevC.108.044601

    • Peer Reviewed
  • [Journal Article] Model independent analysis of femtoscopic correlation functions: An application to the D*s0(2317)2023

    • Author(s)
      Ikeno Natsumi、Toledo Genaro、Oset Eulogio
    • Journal Title

      Physics Letters B

      Volume: 847 Pages: 138281~138281

    • DOI

      10.1016/j.physletb.2023.138281

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Consistency of the Molecular Picture of Ω(2012) with the Latest Belle Results2023

    • Author(s)
      Ikeno Natsumi、Toledo Genaro、Liang Wei-Hong、Oset Eulogio
    • Journal Title

      Few-Body Systems

      Volume: 64 Pages: 55-55

    • DOI

      10.1007/s00601-023-01843-8

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Role of f0(980) and a0(980) in the B-→π-K+K- and B-→π-K0Kbar0 reactions2023

    • Author(s)
      Abreu Luciano M.、Ikeno Natsumi、Oset Eulogio
    • Journal Title

      Physical Review D

      Volume: 108 Pages: 016007-016007

    • DOI

      10.1103/PhysRevD.108.016007

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Effect of the momentum dependence of the neutron and proton potentials on pion production in heavy-ion collisions2023

    • Author(s)
      Natsumi Ikeno
    • Organizer
      RIKEN Workshop: Equation of State of Dense Nuclear Matter at RIBF and FRIB
    • Int'l Joint Research / Invited
  • [Presentation] Interpretation of the Ωc decay into π+KΞ from the Ω(2012) molecular perspective2023

    • Author(s)
      Natsumi Ikeno
    • Organizer
      20th International Conference on Hadron Spectroscopy and Structure (HADRON 2023)
    • Int'l Joint Research
  • [Presentation] Molecular states of D*D*K*bar and B*B*K* nature2023

    • Author(s)
      Natsumi Ikeno
    • Organizer
      20th International Conference on Hadron Spectroscopy and Structure (HADRON 2023)
    • Int'l Joint Research
  • [Presentation] The Zcs states based on the molecular picture2023

    • Author(s)
      Natsumi Ikeno
    • Organizer
      20th International Conference on Hadron Spectroscopy and Structure (HADRON 2023)
    • Int'l Joint Research
  • [Presentation] Impact of the momentum dependence of the neutron and proton potentials on pion production in heavy ion collisions2023

    • Author(s)
      Natsumi Ikeno, Akira Ono
    • Organizer
      NuSym23, XIth International Symposium on Nuclear Symmetry Energy
    • Int'l Joint Research
  • [Presentation] Molecular states of D*D*K*bar and B*B*K* nature2023

    • Author(s)
      池野なつ美
    • Organizer
      ELPH 研究会C035「実験、反応・構 造計算、格子QCD で解き明かすハドロン分光」

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Published: 2024-12-25  

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