论文标题
研究与EPOS模型重型离子碰撞中的亲源功能
Investigating the pion source function in heavy-ion collisions with the EPOS model
论文作者
论文摘要
通过测量在重离子碰撞中产生的乳头的动量相关性，我们可以获得有关粒子发射源的时空几何形状的信息。来自多个不同合作的最新实验结果表明，要正确描述所测量的相关函数的形状，就需要超越高斯近似值。一些研究表明，征税分布可以很好地描述来源。尽管已经有很多实验结果，但在解释观察到的非高斯源形状的解释时，现象学方面的投入很少。 EPOS模型是一种复杂的混合模型，其中新创建的系统的演变受基于Parton的Gribov-Regge理论的控制。事实证明，它在描述了以接近零的巴属化学电位为特征的系统的许多不同的实验观察结果，但迄今尚未详细探讨源形状。在本文中，我们根据EPOS模型的理论方法讨论了发射源来源的研究。
By measuring the momentum correlations of pions created in heavy-ion collisions we can gain information about the space-time geometry of the particle emitting source. Recent experimental results from multiple different collaborations demonstrated that to properly describe the shape of the measured correlation functions, one needs to go beyond the Gaussian approximation. Some studies suggest that the Levy distribution could provide a good description of the source. While there are already many experimental results, there is very little input from the phenomenology side in explanation of the observed non-Gaussian source shapes. The EPOS model is a sophisticated hybrid model where the evolution of the newly-created system is governed by Parton-Based Gribov-Regge theory. It has already proved to be successful in describing many different experimental observations for the systems characterized by baryon chemical potential close to zero, but so far the source shape has not been explored in detail. In this paper we discuss studies of the pion emitting source based on the theoretical approach of the EPOS model.
