三粒子关联下RHIC强宇称破缺效应的探讨
Probe for the strong parity violation effects at RHIC with three particle correlations
摘要：
在非中心相对论重离子碰撞中，碰撞过程中可能产生的\cite{Kharzeev:2004ey}-奇畴将导致电荷沿系统轨道动量分离. \cite{Voloshin:2004vk}中提出了一种可观测的，<$-均匀的，但对电荷分离效应直接敏感的，基于3粒子混合谐波方位角相关。我们报告的STAR测量使用这个观察到的Au+Au和Cu+Cu碰撞在$\sqrt{s_{NN}}$ =200和62 GeV。结果被报告为函数的碰撞中心性，粒子分离的快度，和粒子的横向动量。与奇偶违反无关，但可能有助于信号的影响进行了讨论。
英文摘要：
In non-central relativistic heavy ion collisions, ¶-odd domains, which might be created in the process of the collision, are predicted to lead to charge separation along the system orbital momentum \cite{Kharzeev:2004ey}. An observable, ¶-even, but directly sensitive to the charge separation effect, has been proposed in \cite{Voloshin:2004vk} and is based on 3-particle mixed harmonics azimuthal correlations. We report the STAR measurements using this observable for Au+Au and Cu+Cu collisions at $\sqrt{s_{NN}}$=200 and 62 GeV. The results are reported as function of collision centrality, particle separation in rapidity, and particle transverse momentum. Effects that are not related to parity violation but might contribute to the signal are discussed.
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