RHIC束流能量扫描实验中正反粒子椭圆流的平均场势效应(英文)

徐骏; 柯治明; 李锋; SONG Taesoo; 刘鹤

doi:10.11804/NuclPhysRev.32.02.146

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RHIC束流能量扫描实验中正反粒子椭圆流的平均场势效应(英文)

徐骏, 柯治明, 李锋, SONG Taesoo, 刘鹤

文章导航 > 原子核物理评论 > 2015 > 32(2): 146-153

徐骏, 柯治明, 李锋, SONG Taesoo, 刘鹤. RHIC束流能量扫描实验中正反粒子椭圆流的平均场势效应(英文)[J]. 原子核物理评论, 2015, 32(2): 146-153. doi: 10.11804/NuclPhysRev.32.02.146

引用本文:

XU Jun, KO Cheming, LI Feng, SONG Taesoo, LIU He. Mean-field Effects on Particle and Antiparticle Elliptic Flows in the Beam-energy Scan Program at RHIC[J]. Nuclear Physics Review, 2015, 32(2): 146-153. doi: 10.11804/NuclPhysRev.32.02.146

Citation:

XU Jun, KO Cheming, LI Feng, SONG Taesoo, LIU He. Mean-field Effects on Particle and Antiparticle Elliptic Flows in the Beam-energy Scan Program at RHIC[J]. Nuclear Physics Review, 2015, 32(2): 146-153. doi: 10.11804/NuclPhysRev.32.02.146

RHIC束流能量扫描实验中正反粒子椭圆流的平均场势效应(英文)

doi: 10.11804/NuclPhysRev.32.02.146

中国科学院上海应用物理研究所,上海201800;
Cyclotron Institute and Department of Physics and Astronomy,Texas A&M University, College Station, Texas 77843, USA;
Frankfurt Institut for Advanced Studies and Institute for Theoretical Physics,Johann Wolfgang Goethe Universitat, Frankfurt am Main, Germany;
中国科学院大学,北京100049

Mean-field Effects on Particle and Antiparticle Elliptic Flows in the Beam-energy Scan Program at RHIC

Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China;
Cyclotron Institute and Department of Physics and Astronomy, Texas A&M University,College Station, Texas 77843, USA;
Frankfurt Institut for Advanced Studies and Institute for Theoretical Physics,Johann Wolfgang Goethe Universitat, Frankfurt am Main, Germany;

摘要: 最近，STAR合作体在相对论重离子对撞机的束流能量扫描实验中观测到了正反粒子的椭圆流劈裂。基于输运模型，发现丰重子介质中正反粒子平均场势的不同可以解释其椭圆流的劈裂。利用Nambu-Jona-Lasinio 模型描述相对论重离子碰撞的部分子相，发现实验中正反粒子的相对椭圆流劈裂可以用来约束该模型中夸克矢量相互作用的耦合系数。这一发现对确定QCD相图的临界点位置和理解整个QCD的相结构有重要意义。The elliptic flow splitting between particles and their antiparticles has recently been observed by the STAR Collaboration in the beam-energy scan program at the Relativistic Heavy Ion Collider. In studies based on transport models, we have found that this splitting can be explained by the different mean-field potentials acting on particles and their antiparticles in the produced baryon-rich matter. In particular, we have shown that the experimentally measured relative elliptic flow difference can help constrain the vector coupling constant in the Nambu-Jona-Lasinio model used in describing the partonic stage of heavy-ion collisions. This information is useful for locating the critical point in the QCD phase diagram and thus understanding the phase structure of QCD.
- 束流能量扫描 /
- QCD相图 /
- 椭圆流
Abstract: The elliptic flow splitting between particles and their antiparticles has recently been observed by the STAR Collaboration in the beam-energy scan program at the Relativistic Heavy Ion Collider. In studies based on transport models, we have found that this splitting can be explained by the different mean-field potentials acting on particles and their antiparticles in the produced baryon-rich matter. In particular, we have shown that the experimentally measured relative elliptic flow difference can help constrain the vector coupling constant in the Nambu-Jona-Lasinio model used in describing the partonic stage of heavy-ion collisions. This information is useful for locating the critical point in the QCD phase diagram and thus understanding the phase structure of QCD.
- beam-energy scan program /
- QCD phase diagram /
- elliptic flow

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RHIC束流能量扫描实验中正反粒子椭圆流的平均场势效应(英文)

doi: 10.11804/NuclPhysRev.32.02.146

中国科学院上海应用物理研究所,上海201800;

Cyclotron Institute and Department of Physics and Astronomy,Texas A&M University, College Station, Texas 77843, USA;

Frankfurt Institut for Advanced Studies and Institute for Theoretical Physics,Johann Wolfgang Goethe Universitat, Frankfurt am Main, Germany;

中国科学院大学,北京100049

收稿日期: 1900-01-01
修回日期: 1900-01-01
刊出日期: 2015-06-20

关键词:

束流能量扫描 /

QCD相图 /

椭圆流

摘要: 最近，STAR合作体在相对论重离子对撞机的束流能量扫描实验中观测到了正反粒子的椭圆流劈裂。基于输运模型，发现丰重子介质中正反粒子平均场势的不同可以解释其椭圆流的劈裂。利用Nambu-Jona-Lasinio 模型描述相对论重离子碰撞的部分子相，发现实验中正反粒子的相对椭圆流劈裂可以用来约束该模型中夸克矢量相互作用的耦合系数。这一发现对确定QCD相图的临界点位置和理解整个QCD的相结构有重要意义。The elliptic flow splitting between particles and their antiparticles has recently been observed by the STAR Collaboration in the beam-energy scan program at the Relativistic Heavy Ion Collider. In studies based on transport models, we have found that this splitting can be explained by the different mean-field potentials acting on particles and their antiparticles in the produced baryon-rich matter. In particular, we have shown that the experimentally measured relative elliptic flow difference can help constrain the vector coupling constant in the Nambu-Jona-Lasinio model used in describing the partonic stage of heavy-ion collisions. This information is useful for locating the critical point in the QCD phase diagram and thus understanding the phase structure of QCD.