论文标题
小型和大型系统中杂交强化的首先结果
First results from Hybrid Hadronization in small and large systems
论文作者
论文摘要
“混合强化”是一种新的蒙特卡洛包装，用于放体量。当相位空间中的partons之间的距离很小时，适用于适用的夸克重组，并且按照Han等人概述的图片，适用于稀释的Parton系统的弦碎片。 [PRC 93，045207（2016）]。混合强化与毕缩影8集成在一起，可以应用于$ e^++ e^ - $到$ a+a $ collisions的各种系统。它采用Parton的系统及其颜色流信息，例如从蒙特卡洛（Monte Carlo Parton）淋浴生成器作为输入。此外，如果为$ a+a $碰撞提供了热背景介质，则该包装允许对有助于强扎的热部对。混合强化可以用作独立代码，自2.0版本以来也是Jetscape的一部分。在这些程序中，我们回顾了混合强化强调的物理概念，并演示了用户如何与各种Parton Shower Monte Carlos一起使用代码。当将杂交强调与Parton Shower Monte Carlos Matter和LBT结合使用时，我们介绍了小型和大型系统中强子化学和碎片功能的计算。特别是，我们讨论了淋浴部分重组与热区的可观察到的作用。
"Hybrid Hadronization" is a new Monte Carlo package to hadronize systems of partons. It smoothly combines quark recombination applicable when distances between partons in phase space are small, and string fragmentation appropriate for dilute parton systems, following the picture outlined by Han et al. [PRC 93, 045207 (2016)]. Hybrid Hadronization integrates with PYTHIA 8 and can be applied to a variety of systems from $e^++e^-$ to $A+A$ collisions. It takes systems of partons and their color flow information, for example from a Monte Carlo parton shower generator, as input. In addition, if for $A+A$ collisions a thermal background medium is provided, the package allows sampling thermal partons that contribute to hadronization. Hybrid Hadronization is available for use as a standalone code and is also part of JETSCAPE since the 2.0 release. In these proceedings we review the physics concepts underlying Hybrid Hadronization and demonstrate how users can use the code with various parton shower Monte Carlos. We present calculations of hadron chemistry and fragmentation functions in small and large systems when Hybrid Hadronization is combined with parton shower Monte Carlos MATTER and LBT. In particular, we discuss observable effects of the recombination of shower partons with thermal partons.
