研究者業績

平野 哲文

ヒラノ テツフミ  (Hirano Tetsufumi)

基本情報

所属
上智大学 理工学部機能創造理工学科 教授
学位
博士(理学)(2001年3月 早稲田大学)

研究者番号
40318803
J-GLOBAL ID
201201033858822423
researchmap会員ID
7000003538

外部リンク

(研究テーマ)
高エネルギー原子核衝突反応のダイナミクスを詳細に記述することにより、生成されたクォーク・グルーオン・プラズマの輸送的性質の研究を行っている


主要な論文

 106
  • Kenshi Kuroki, Azumi Sakai, Koichi Murase, Tetsufumi Hirano
    Physics Letters B 842 137958-137958 2023年5月  査読有り責任著者
  • Yuuka Kanakubo, Yasuki Tachibana, Tetsufumi Hirano
    106(5) 054908-1-054908-7 2022年11月18日  査読有り責任著者
  • Yuuka Kanakubo, Yasuki Tachibana, Tetsufumi Hirano
    Physical Review C 105(2) 024905-1-024905-23 2022年2月9日  査読有り
  • Azumi Sakai, Koichi Murase, Tetsufumi Hirano
    Physical Review C 102(6) 064903-1-064903-15 2020年12月2日  査読有り
  • Yuuka Kanakubo, Yasuki Tachibana, Tetsufumi Hirano
    Physical Review C 101(2) 024912-1-024912-12 2020年2月24日  査読有り
  • Tetsufumi Hirano, Ryuichi Kurita, Koichi Murase
    Nuclear Physics A 984 44-67 2019年1月28日  査読有り
  • Yuuka Kanakubo, Michito Okai, Yasuki Tachibana, Tetsufumi Hirano
    Progress of Theoretical and Experimental Physics 2018(12) 121D01 2018年12月1日  査読有り
  • Yukinao Akamatsu, Masayuki Asakawa, Tetsufumi Hirano, Masakiyo Kitazawa, Kenji Morita, Koichi Murase, Yasushi Nara, Chiho Nonaka, Akira Ohnishi
    PHYSICAL REVIEW C 98(2) 024909-1-024909-9 2018年8月  査読有り
    We develop a new dynamical model for high-energy heavy-ion collisions in the beam energy region of the highest net-baryon densities on the basis of nonequilibrium microscopic transport model JAM and macroscopic (3 + 1)-dimensional hydrodynamics by utilizing a dynamical initialization method. In this model, dynamical fluidization of a system is controlled by the source terms of the hydrodynamic fields. In addition, time-dependent core-corona separation of hot regions is implemented. We show that our new model describes multiplicities and mean transverse mass in heavy-ion collisions within a beam-energy region of 3 < root s(NN) < 30 GeV. Good agreement of the beam-energy dependence of the K+/pi(+) ratio is obtained, which is explained by the fact that a part of the system is not thermalized in our core-corona approach.
  • Michito Okai, Koji Kawaguchi, Yasuki Tachibana, Tetsufumi Hirano
    PHYSICAL REVIEW C 95(5) 2017年5月  査読有り
    We propose a new approach to initialize the hydrodynamic fields, such as energy density distributions and four-flow velocity fields in hydrodynamic modeling of high-energy nuclear collisions at the collider energies. Instead of matching the energy-momentum tensor or putting the initial conditions of quark-gluon fluids at a fixed initial time, we utilize a framework of relativistic hydrodynamic equations with source terms to describe the initial stage. Putting the energy and momentum loss rate of the initial partons into the source terms, we obtain hydrodynamic initial conditions dynamically. The resultant initial profile of the quark-gluon fluid looks highly bumpy as seen in the conventional event-by-event initial conditions. In addition, initial random flow velocity fields also are generated as a consequence of momentum deposition from the initial partons. We regard the partons that survive after the dynamical initialization process as the mini-jets and find sizable effects of both mini-jet propagation in the quark-gluon fluids and initial random transverse flow on the final momentum spectra and anisotropic flow observables. We perform event-by-event (3+1)-dimensional ideal hydrodynamic simulations with this new framework that enables us to describe the hydrodynamic bulk collectivity, parton energy loss, and interplay among them in a unified manner.

MISC

 76

書籍等出版物

 2

講演・口頭発表等

 68

共同研究・競争的資金等の研究課題

 8

その他

 2