Full jet in a multi-phase transport model

NIE Maowu; MA Guoliang

doi:10.11889/j.0253-3219.2014.hjs.37.100519

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Full jet in a multi-phase transport model

更新时间：2021-03-03

- Full jet in a multi-phase transport model
- NUCLEAR TECHNIQUES Vol. 37, Issue 10, Article number: 100519(2014)
- 作者机构：
  
  1. 中国科学院上海应用物理研究所嘉定园区,上海,201800
  2. 中国科学院大学,北京,100049
- 作者简介：
- 基金信息：
- DOI：10.11889/j.0253-3219.2014.hjs.37.100519
  CLC：
- Published：16 October 2014
- 稿件说明：
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NIE Maowu, MA Guoliang. Full jet in a multi-phase transport model[J]. Nuclear techniques, 2014, 37(10): 100519
DOI：

NIE Maowu, MA Guoliang. Full jet in a multi-phase transport model[J]. Nuclear techniques, 2014, 37(10): 100519 DOI： 10.11889/j.0253-3219.2014.hjs.37.100519.

摘要

在相对论重离子碰撞中，整体喷注作为研究解禁闭的夸克胶子等离子体的重要探针近年来已被广泛研究。本工作基于多相输运模型(A Multi-Phase Transport model

AMPT)，研究了在质心系能量为2.76 TeV的铅核-铅核碰撞中的双喷注不对称、喷注的碎裂函数和喷注形状三方面的内容。数值模拟结果表明，在喷注与部分子物质的强相互作用中，喷注会有明显的能量损失。末态双喷注不对称是由初态不对称度和部分子喷注能损的共同作用导致的；喷注的碎裂函数可以分解为碎裂强子化和组合强子化两部分；相比于领头喷注，由于次领头喷注能量损失更大，所以导致次领头喷注的形状改变更大一些。

Abstract

Background: Jet

produced by initial quantum chromodynamics QCD hard scatterings

is one of the important probes to study the properties of strongly-interacting matter because it interacts with the QCD medium and loses its energy when it passes through the QCD medium. Purpose: To understand the mechanism of jet quenching

a complementary study on fully reconstructed jet is essential. Methods: In this work

a multiphase transport model is utilized to study the dijet asymmetry

jet fragmentation function and jet shape. Results: The A Multi-Phase Transport model (AMPT) simulation results can basically describe the experimental data. Jet loses energy significantly for strong interactions between jets and partonic matter. Conclusion: Final dijet asymmetry is driven by both initial dijet asymmetry and partonic jet energy loss. Jet fragmentation function can be decomposed into fragmentation and coalescence parts. Compared with leading jet

the subleading jet shows a larger medium modification for its shapes

especially in central Pb+Pb collisions with a larger dijet asymmetry. Abstract

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