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development of an event generator for high energy nuclear collisions based on a microscopic transport model

Research Project

Project/Area Number 17K05448
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Particle/Nuclear/Cosmic ray/Astro physics
Research InstitutionAkita International University

Principal Investigator

Nara Yasushi  国際教養大学, 国際教養学部, 教授 (70453008)

Project Period (FY) 2017-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2020: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2019: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2018: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2017: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywordsクォークグルーオンプラズマ / 高エネルギー原子核衝突 / QCD状態方程式 / 輸送理論 / 数値シミュレーション / 重イオン衝突 / 微視的輸送理論 / 量子分子動力学 / 相対論的平均場理論 / デルタ物質 / イベントジェネレーター / 理論核物理
Outline of Final Research Achievements

Several experiments such as STAR-BES and NA61/SHINE are ongoing, and FAIR,NICA, and J-PARC-HI experiments are planning to explore the phase structure of QCD matter for a wide range of temperature and densities. An event generator JAM2 (Jet AA Microscopic transport model) based on a microscopic transport model,which describes the spacetime evolution of heavy-ion collision, has been developed to extract information about the properties of QCD matter. We have developed three approaches to control the equation of state: 1) Modified two-body collision term, 2) Hydrodynamics + cascade model and hydrodynamics + quantum molecular dynamics, 3) Relativistic quantum molecular dynamics based on the relativistic mean-field theory of sigma-omega interactions.

Academic Significance and Societal Importance of the Research Achievements

JAM2は高エネルギー原子核衝突で発生する事象(event) すなわち、すべての生成された粒子の運動量分布の情報をシミュレートする世界標準 Monte Carlo event generatorである。JAM2は高エネルギー原子核衝突の時空発展を微視的に記述する理論的枠組みであり実験値から高密度QCD物質の性質を明らかにすることに貢献する。最新版JAM2の開発は高エネルギ一物理、原子核実験だけでなく、中性子散乱、原子炉、核変換、医療、加速器、宇宙工学などの応用分野へ多大な影響を与えるものになる。

Report

(5 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (41 results)

All 2021 2020 2019 2018 2017 Other

All Int'l Joint Research (8 results) Journal Article (14 results) (of which Int'l Joint Research: 11 results,  Peer Reviewed: 13 results,  Open Access: 6 results) Presentation (19 results) (of which Int'l Joint Research: 8 results,  Invited: 10 results)

  • [Int'l Joint Research] フランクフルト高等研究所 (FIAS)(ドイツ)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] サンパウロ大学(ブラジル)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] フランクフルト高等研究所 (FIAS)(ドイツ)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] フランクフルト高等研究所(FIAS)(ドイツ)

    • Related Report
      2018 Research-status Report
  • [Int'l Joint Research] 華中師範大学 (Wuhan)(中国)

    • Related Report
      2018 Research-status Report
  • [Int'l Joint Research] 湖州師範大学(中国)

    • Related Report
      2018 Research-status Report
  • [Int'l Joint Research] ゲーテ大学 (フランクフルト)(ドイツ)

    • Related Report
      2017 Research-status Report
  • [Int'l Joint Research] 華中師範大学 (Wuhan)(中国)

    • Related Report
      2017 Research-status Report
  • [Journal Article] Non-perturbative renormalization of the average color charge and multi-point correlators of color charge from a non-Gaussian small-x action2021

    • Author(s)
      A. V. Giannini and Y. Nara
    • Journal Title

      Nuclear Physics A

      Volume: 1010 Pages: 122178-122178

    • DOI

      10.1016/j.nuclphysa.2021.122178

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Momentum-dependent potential and collective flows within the relativistic quantum molecular dynamics approach based on relativistic mean-field theory2020

    • Author(s)
      Nara Yasushi、Maruyama Tomoyuki、Stoecker Horst
    • Journal Title

      Physical Review C

      Volume: 102 Issue: 2 Pages: 024913-024913

    • DOI

      10.1103/physrevc.102.024913

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Dynamically Integrated Transport Model for High-energy Nuclear Collisions at 3<$\sqrt{s_{NN}}$<30 GeV2020

    • Author(s)
      Koichi Murase, Yukinao Akamatsu, Masayuki Asakawa, Tetsufumi Hirano, Masakiyo Kitazawa, Kenji Morita, Yasushi Nara, Chiho Nonaka, Akira Ohnishi
    • Journal Title

      JPS Conf. Proc.

      Volume: 32

    • DOI

      10.7566/jpscp.32.010081

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Sensitivity of the excitation functions of collective flow to relativistic scalar and vector meson interactions in the relativistic quantum molecular dynamics model RQMD.RMF2019

    • Author(s)
      Yasushi Nara, Horst Stoecker
    • Journal Title

      Physical Review C

      Volume: 100 Issue: 5

    • DOI

      10.1103/physrevc.100.054902

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] JAM: an event generator for high energy nuclear collisions2019

    • Author(s)
      Yasushi Nara
    • Journal Title

      EPJ Web of Conferences

      Volume: 208 Pages: 11004-11004

    • DOI

      10.1051/epjconf/201920811004

    • Related Report
      2019 Research-status Report
    • Open Access
  • [Journal Article] Dynamically Integrated Transport Approach for High-Energy Nuclear Collisions at High Baryon Density2019

    • Author(s)
      Koichi Murase, Yukinao Akamatsu, Masayuki Asakawa, Tetsufumi Hirano, Masakiyo Kitazawa, Kenji Morita, Yasushi Nara, Chiho Nonaka, Akira Ohnishi
    • Journal Title

      JPS Conference Proceedings

      Volume: 26 Pages: 024016-024016

    • DOI

      10.7566/jpscp.26.024016

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Centrality and energy dependence of charged particles in p+A and A+A collisions from running coupling kT -factorization2019

    • Author(s)
      A. Dumitru, A. V. Giannini, M. Luzum and Y. Nara,
    • Journal Title

      Acta Phys. Pol. B Proc. Suppl.

      Volume: 12 Issue: 4 Pages: 973-978

    • DOI

      10.5506/aphyspolbsupp.12.973

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Beam energy dependence of the squeeze-out effect on the directed and elliptic flow in Au + Au collisions in the high baryon density region2018

    • Author(s)
      C. Zhang, J. Chen, X. Luo, F. Liu and Y. Nara
    • Journal Title

      Phys. Rev. C

      Volume: 97 Issue: 6

    • DOI

      10.1103/physrevc.97.064913

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Dynamically integrated transport approach for heavy-ion collisions at high baryon density2018

    • Author(s)
      Yukinao Akamatsu, Masayuki Asakawa, Tetsufumi Hirano, Masakiyo Kitazawa, Kenji Morita, Koichi Murase, Yasushi Nara, Chiho Nonaka, Akira Ohnishi
    • Journal Title

      Physical Review C

      Volume: no.2, 024909 Issue: 2 Pages: 024909-024909

    • DOI

      10.1103/physrevc.98.024909

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] The enhancement of v 4 in nuclear collisions at the highest densities signals a first- order phase transition2018

    • Author(s)
      Y. Nara, J. Steinheimer and H. Stoecker
    • Journal Title

      Eur. Phys. J.

      Volume: 54 Issue: 11 Pages: 188-193

    • DOI

      10.1140/epja/i2018-12626-y

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Effects of mean‐field and softening of equation of state on elliptic flow in Au+Au collisions at $\sqrts_{NN}}=5$ GeV from the JAM model2018

    • Author(s)
      Jiamin Chen, Xiaofeng Luo, Feng Liu, and Yasushi Nara
    • Journal Title

      Chin. Phys. C

      Volume: 42 Issue: 2 Pages: 024001-024001

    • DOI

      10.1088/1674-1137/42/2/024001

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Enhancement of elliptic flow can signal a first order phase transition in high energy heavy ion collisions2018

    • Author(s)
      Yasushi Nara, Harri Niemi, Akira Ohnishi, Jan Steinheimer, Xiaofeng Luo, Horst Stoecker
    • Journal Title

      Eur.Phys.J. A

      Volume: 54 Issue: 2

    • DOI

      10.1140/epja/i2018-12413-x

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Equation of state dependence of directed flow in a microscopic transport model2017

    • Author(s)
      Y. Nara, H. Niemi, J. Steinheimer, H. Stoecker
    • Journal Title

      Phys. Lett. B

      Volume: 769 Pages: 543-548

    • DOI

      10.1016/j.physletb.2017.02.020

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Directed Flow in Heavy-ion Collisions and Softening of Equation of State2017

    • Author(s)
      A. Ohnishi, Y. Nara, H. Niemi, H. Stoecker
    • Journal Title

      Acta Phys. Polon. Supp.

      Volume: 10 Issue: 3 Pages: 699-703

    • DOI

      10.5506/aphyspolbsupp.10.699

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] 高エネルギー原子核衝突のためのイベントジェネレータJAM22021

    • Author(s)
      奈良寧
    • Organizer
      日本物理学会 第76回年次大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Anisotropic flows within relativistic quantum molecular dynamics(RQMD.RMF) with momentum-dependent potential2021

    • Author(s)
      奈良寧
    • Organizer
      Symposium of the HADES collaboration Meeting XXX 'Transport meets HADES, symposium during the HADES Collaboration Meeting XL'
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 運動量依存ポテンシャルを取り入れた相対論的平均場理論量子分子動力学(RQMD.RMF)による集団フローの解析2020

    • Author(s)
      奈良寧
    • Organizer
      日本物理学会 2020年秋季大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] デルタマターとバリオン数高次揺らぎ2020

    • Author(s)
      奈良 寧
    • Organizer
      日本物理学会2020年次大会
    • Related Report
      2019 Research-status Report
  • [Presentation] Hydrodynamic quantum molecular dynamics approach in JAM2019

    • Author(s)
      Yasushi Nara
    • Organizer
      International Workshop on Partonic and Hadronic Transport Approaches for Relativistic Heavy Ion Collisions
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Relativistic quantum molecular dynamics with scalar and vector interactions2019

    • Author(s)
      Yasushi Nara
    • Organizer
      The 36th Heavy Ion cafe
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] Relativistic molecular dynamics approach for heavy‐ion collisions at high baryon region2019

    • Author(s)
      Yasushi Nara
    • Organizer
      The 17th International Conference on QCD in Extreme Conditions
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 相対論的平均場理論の量子分子動力学シミュレーションによる集団フローの解析2019

    • Author(s)
      奈良 寧
    • Organizer
      日本物理学会2019年秋季大会
    • Related Report
      2019 Research-status Report
  • [Presentation] pp,pA,AA衝突のダイナミックスは同時に理解したか? QGPシミュレーションの理論の現状2019

    • Author(s)
      奈良 寧
    • Organizer
      第29回Heavy Ion Pub研究会
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] Dynamically integrated transport model for heavy ion collisions at J-PARC-HI2019

    • Author(s)
      奈良寧
    • Organizer
      The 52nd Reimei Workshop “Experimental and Theoretical Hadron Physics: Re- cent Exciting Developments”
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 流体量子分子動力学(HyQMD)による集団フローの解析2019

    • Author(s)
      奈良寧
    • Organizer
      日本物理学会第 74 回年次大会 (2019 年 ) 九州大学 ( 伊都キャンパスキャンパス )
    • Related Report
      2018 Research-status Report
  • [Presentation] JAM:an event generator for high energy nuclear collisions2018

    • Author(s)
      奈良寧
    • Organizer
      20th International Symposium on Very High Energy Cosmic Ray Interactions
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] K/pi ratios from a dynamically integrated transport approach2018

    • Author(s)
      奈良寧
    • Organizer
      YITP long-term workshop New Frontiers in QCD 2018 - Confinement, Phase Tran- sition, Hadrons, and Hadron Interactions -
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Signatures of the 1st order phase transition in heavy-ion collisions at FAIR ener- gies2018

    • Author(s)
      奈良寧
    • Organizer
      Physics Symposium at 32 nd CBM collaboration meeting
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Recent development and future perspectives in dynamical simulation of heavy ion collisions at the highest baryon density region2018

    • Author(s)
      奈良 寧
    • Organizer
      2017年度 KEK理論センターJ-PARC分室活動 総括研究会
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] Pythia8 and JAM event generators2018

    • Author(s)
      奈良 寧
    • Organizer
      第二回空気シャワー観測による宇宙線の起源探索勉強会
    • Related Report
      2017 Research-status Report
  • [Presentation] 1 次相転移のシグナルとしての v 4 の増大2018

    • Author(s)
      奈良 寧
    • Organizer
      日本物理学会 第 73 回年次大会
    • Related Report
      2017 Research-status Report
  • [Presentation] Extension of Pythia8 to high energy nuclear collisions2017

    • Author(s)
      Yasushi Nara
    • Organizer
      Workshop on forward physics and high-energy scattering at zero degrees 2017 (HESZ2017)
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Efects of Phase Transition on Collective Flows From a Microscopic Transport Mode2017

    • Author(s)
      Yasushi Nara
    • Organizer
      EMMI International workshop on Critical Fluctuations near the QCD phase boundary in relativistic nuclear collisions
    • Related Report
      2017 Research-status Report
    • Invited

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Published: 2017-04-28   Modified: 2022-02-22  

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