论文标题
Parton淋浴的形成时间对重合离子碰撞中喷射淬火的影响
Effects of the formation time of parton shower on jet quenching in heavy-ion collisions
论文作者
论文摘要
喷气淬火已成功地用作研究夸克 - 糖血浆（QGP）的性质的硬探测器。作为一个多粒子系统，喷气机需要时间从高度虚拟的part量到接近大众壳的一组部分。在这项研究中，我们介绍了一项关于这种形成时间对相对论核碰撞中喷射淬火的影响的系统研究。用毕腹模拟了初始硬散射的喷气机，并使用线性玻尔兹曼传输（LBT）模型描述了它们与QGP的相互作用，该模型在射流partons和热培养基之间均包含弹性和非弹性散射。实施了三种不同的射流形成时间估计，并进行了比较，包括瞬时形成，单个分裂的形成以及顺序分割的形成，在此之前没有假定射流中等相互作用。我们发现，以更长的形成时间推迟射流中的相互作用不仅会影响喷气机的核修饰因子的整体幅度，还影响其对喷气横向动量的依赖。
Jet quenching has successfully served as a hard probe to study the properties of Quark-Gluon Plasma (QGP). As a multi-particle system, jets take time to develop from a highly virtual parton to a group of partons close to mass shells. In this study, we present a systematical study on the effects of this formation time on jet quenching in relativistic nuclear collisions. Jets from initial hard scatterings were simulated with Pythia, and their interactions with QGP were described using a Linear Boltzmann Transport (LBT) model that incorporates both elastic and inelastic scatterings between jet partons and the thermal medium. Three different estimations of the jet formation time were implemented and compared, including instantaneous formation, formation from single splitting, and formation from sequential splittings, before which no jet-medium interaction was assumed. We found that deferring the jet-medium interaction with a longer formation time not only affects the overall magnitude of the nuclear modification factor of jets, but also its dependence on the jet transverse momentum.
