arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1612.02408nucl-th
收藏

反常输运模型中手征涡旋和磁场效应的研究

Study of chiral vortical and magnetic effects in the anomalous transport model

Yifeng Sun, Che Ming Ko

摘要:

本文在反常输运模型的基础上,扩展了我们最近对相对论重离子碰撞中手征磁效应的研究。我们发现,虽然在手性恢复的夸克物质,这是由于在非中心碰撞的大角动量,涡旋可以产生一个轴向电荷偶极矩的横向平面的重离子碰撞,它不会产生不同的偏心率的负和正电荷粒子。因此,仅包括手征涡旋效应不能导致带负电和带正电粒子的椭圆流之间的分裂。另一方面,如果考虑到强而长寿命的磁场的影响,带负电和带正电的粒子在其椭圆流中确实会产生分裂。然而,如实验所见,椭圆流分裂对夸克物质电荷不对称性的依赖性具有正斜率,需要忽略洛伦兹力的影响。在这种情况下,椭圆流分裂出现,即使在消失的电荷不对称性。

英文摘要:

We extend our recent study of chiral magnetic effect in relativistic heavy ion collisions based on an anomalous transport model by including also the chiral vortical effect. We find that although vorticities in the chirally restored quark matter, which result from the large angular momentum in non-central collisions, can generate an axial charge dipole moment in the transverse plane of a heavy ion collision, it does not produce a difference in the eccentricities of negatively and positively charged particles. As a result, including the chiral vortical effect alone cannot lead to a splitting between the elliptic flows of negatively and positively charged particles. On the other hand, negatively and positively charged particles do develop a splitting in their elliptic flows if the effect due to a strong and long-lived magnetic field is also included. However, to have a positive slope in the dependence of the elliptic flow splitting on the charge asymmetry of the quark matter, as seen in experiments, requires the neglect of the effect of the Lorentz force. In this case, an elliptic flow splitting appears even at vanishing charge asymmetry.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑