Abstract

Bose–Einstein correlations of identical bosons reveal information about the space-time structure of particle emission from the sQGP formed in ultra-relativistic heavy-ion collisions. Previous measurements of two particle correlations have shown that the source can best be described by a symmetric Levy distribution. Here we report on the measurement of three-particle correlations in 0–30% centrality Au + Au collisions at \(\sqrt {{{s}_{{{\text{NN}}}}} = 200} \) GeV, and describe them with a Lévy type source. This measurement may shed light on hadron creation mechanisms beyond chaotic emission. We measure three particle correlation strength (\({{\lambda }_{3}}\)) as a function of pair transverse momentum. This parameter, combined with two-particle correlation strength \({{a}_{2}}\) may reveal the level of chaoticity and coherence in particle production.

中文翻译：

---

PHENIX的三粒子LévyHBT

摘要

玻色子与爱因斯坦的玻色子相关性揭示了超相对论重离子碰撞中形成的sQGP的粒子发射的时空结构信息。先前对两个粒子相关性的测量表明，源最好用对称的Levy分布来描述。在这里我们报告了在\（\ sqrt {{{s} _ {{{\ text {NN}}}}} = 200} \） GeV的0–30％中心Au + Au碰撞中三粒子相关性的测量，并使用Lévy类型的来源对其进行描述。这种测量可能会揭示混沌发射以外的强子产生机理。我们测量了三个粒子相关强度（\（{{\ lambda} _ {3}} \））作为对横向动量的函数。该参数结合两粒子相关强度\（{{a} _ {2}} \）可能会揭示粒子生成中的混乱程度和相干性。