Inclusive jet and hadron suppression in a multistage approach-猫眼课题宝

DOI：

10.1103/physrevc.107.034911

发表时间：

2022-04

期刊：

Physical Review C

影响因子：

3.1

通讯作者：

中科院分区：

物理与天体物理2区

文献类型：

作者：

A. Kumar;Y. Tachibana;C. Sirimanna;G. Vujanovic;S. Cao;A. Majumder;Y. Chen;L. Du;R. Ehlers;D. Everett;W. Fan;Y. He;J. Mulligan;C. Park;A. Angerami;R. Arora;S. Bass;T. Dai;H. Elfner;R. Fries;C. Gale;F. Garza;Matthew Heffernan;U. Heinz;B. Jacak;P. Jacobs;S. Jeon;K. Kauder;L. Kasper;W. Ke;M. Kelsey;B. Kim;M. Kordell;J. Latessa;Y. Lee;D. Liyanage;A. Lopez;M. Luzum;S. Mak;A. Mankolli;C. Martin;Mehryar Habibi Roudkenar;T. Mengel;C. Nattrass;D. Oliinychenko;J. Paquet;J. Putschke;G. Roland;B. Schenke;L. Schwiebert;A. Sengupta;Chen Shen;A. Silva;D. Soeder;R. Soltz;J. Staudenmaier;M. Strickland;J. Velkovska;X.-N. Wang;R. Wolpert

我们提出了一个新的研究喷流相互作用的夸克胶子等离子体中产生的高能重离子碰撞，使用多级事件发生器内的JETSCAPE框架。我们专注于介质引起的修改率的包容性射流和高横动量（高$p_{\mathrm{T}}$）强子。散射引起的喷流能量损失分两个阶段计算：一个高虚拟阶段的物质模型的基础上，其中高度虚拟的部分子的散射修改真空辐射图案，和第二阶段在较低的喷流虚拟的基础上的LBT模型，其中领先的部分子获得和失去虚拟的散射和辐射。还包括降低物质阶段介质诱导发射率的相干效应。初始条件采用特伦托模型，粘性水动力演化采用（2+1）维VISHNU模型。射流与介质的相互作用是通过2- 2散射与德拜屏蔽势，其中反冲部分子被跟踪，强子化，并包括在射流集群。介质中留下的空穴也被跟踪和减去，以保持横向动量。计算了包含喷流和高p T强子的核修正因子（AA），并与BNL相对论重离子对撞机（RHIC）和CERN大型强子对撞机（LHC）的实验结果进行了比较.在这个框架内，我们发现，与一个额外的参数，它编纂的过渡阶段之间的喷气修改-沿着与典型的参数，如在介质中的耦合，开始和停止标准等-我们可以描述这些数据在所有的能量中心和半中心碰撞没有重新缩放的喷流输运系数$\hat{q}$。

We present a new study of jet interactions in the quark-gluon plasma created in high-energy heavy-ion collisions, using a multistage event generator within the JETSCAPE framework. We focus on medium-induced modifications in the rate of inclusive jets and high transverse momentum (high-$p_{\mathrm{T}}$) hadrons. Scattering-induced jet energy loss is calculated in two stages: A high virtuality stage based on the MATTER model, in which scattering of highly virtual partons modifies the vacuum radiation pattern, and a second stage at lower jet virtuality based on the LBT model, in which leading partons gain and lose virtuality by scattering and radiation. Coherence effects that reduce the medium-induced emission rate in the MATTER phase are also included. The TRENTo model is used for initial conditions, and the (2+1)dimensional VISHNU model is used for viscous hydrodynamic evolution. Jet interactions with the medium are modeled via 2-to-2 scattering with Debye screened potentials, in which the recoiling partons are tracked, hadronized, and included in the jet clustering. Holes left in the medium are also tracked and subtracted to conserve transverse momentum. Calculations of the nuclear modification factor ($R_{\mathrm{AA}}$) for inclusive jets and high-$p_{\mathrm{T}}$ hadrons are compared to experimental measurements at the BNL Relativistic Heavy Ion Collider (RHIC) and the CERN Large Hadron Collider (LHC). Within this framework, we find that with one extra parameter which codifies the transition between stages of jet modification -- along with the typical parameters such as the coupling in the medium, the start and stop criteria etc. -- we can describe these data at all energies for central and semicentral collisions without a rescaling of the jet transport coefficient $\hat{q}$.

Inclusive jet and hadron suppression in a multistage approach

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