A Monte Carlo model for 'jet quenching'

被引：131

作者：

Zapp, Korinna ^{[1
,2
]}

Ingelman, Gunnar ^{[3
]}

Rathsman, Johan ^{[3
]}

Stachel, Johanna ^{[2
]}

Wiedemann, Urs Achim ^{[1
]}

机构：

[1] CERN, Dept Phys, Theory Unit, CH-1211 Geneva 23, Switzerland

[2] Heidelberg Univ, Inst Phys, D-69120 Heidelberg, Germany

[3] Uppsala Univ, Uppsala 75121, Sweden

来源：

EUROPEAN PHYSICAL JOURNAL C | 2009年 / 60卷 / 04期

基金：

瑞典研究理事会;

关键词：

QUARK-GLUON PLASMA; RADIATIVE ENERGY-LOSS; SOFT QCD SCATTERING; HEAVY-QUARK; PERSPECTIVE; COLLISIONS; MATTER; PP;

D O I：

10.1140/epjc/s10052-009-0941-2

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We have developed the Monte Carlo simulation program JEWEL 1.0 (Jet Evolution With Energy Loss), which interfaces a perturbative final-state parton shower with medium effects occurring in ultra-relativistic heavy-ion collisions. This is done by comparing for each jet fragment the probability of further perturbative splitting with the density-dependent probability of scattering with the medium. A simple hadronisation mechanism is included. In the absence of medium effects, we validate JEWEL against a set of benchmark jet measurements. For elastic interactions with the medium, we characterise not only the medium-induced modification of the jet, but also the jet-induced modification of the medium. Our main physical result is the observation that collisional and radiative medium modifications lead to characteristic differences in the jet fragmentation pattern, which persist above a soft background cut. We argue that this should allow one to disentangle collisional and radiative parton energy loss mechanisms by measuring the n-jet fraction or a class of jet shape observables.

引用

页码：617 / 632

页数：16

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