Author:
Blaizot Jean-Paul,Dominguez Fabio,Iancu Edmond,Mehtar-Tani Yacine
Abstract
Abstract
We study the evolution of an energetic jet which radiates gluons while propagating through a dense QCD medium modeled as a random distribution of color sources. Motivated by the heavy ion experimental program at the LHC, we focus on the medium induced radiation of (relatively) soft gluons, which are abundantly emitted at large angles and thus can transport a small fraction of the jet energy far away from the jet axis. We perform a complete calculation of the medium-induced gluon branching in the regime where the gluons that take part in the branching undergo multiple soft scattering with the medium. We extend the BDMPSZ theory of radiative energy loss by including the transverse momentum dependence in the kernel that describes the branching and by analyzing the correlations between the two offspring gluons. We demonstrate that these gluons lose color coherence with respect to each other over a time scale that is comparable to the duration of the branching. It follows that interference effects between successive emissions are suppressed, a necessary ingredient for a description of multiple emission of soft gluons by a probabilistic, branching process.
Publisher
Springer Science and Business Media LLC
Subject
Nuclear and High Energy Physics
Reference38 articles.
1. ALICE collaboration, K. Aamodt et al., Suppression of Charged Particle Production at Large Transverse Momentum in Central Pb-Pb Collisions at
$\sqrt{{{s_{{N\;N}}}}}=2.76\;TeV$, Phys. Lett.
B 696 (2011) 30 [arXiv:1012.1004] [INSPIRE].
2. ATLAS collaboration, Observation of a Centrality-Dependent Dijet Asymmetry in Lead-Lead Collisions at
$\sqrt{{{s_{{N\;N}}}}}=2.77\;TeV$
with the ATLAS Detector at the LHC, Phys. Rev. Lett.
105 (2010) 252303 [arXiv:1011.6182] [INSPIRE].
3. CMS collaboration, Observation and studies of jet quenching in PbPb collisions at nucleon-nucleon center-of-mass energy = 2.76 TeV, Phys. Rev.
C 84 (2011) 024906 [arXiv:1102.1957] [INSPIRE].
4. CMS collaboration, Jet momentum dependence of jet quenching in PbPb collisions at
$\sqrt{{{s_{{N\;N}}}}}=2.76\;TeV$, Phys. Lett. B 712 (2012) 176 [arXiv:1202.5022] [INSPIRE].
5. STAR collaboration, J. Putschke, First gmentation function measurements from full jet reconstruction in heavy-ion collisions at
$\sqrt{{{S_{\mathrm{Nn}}}}}=200\;Gev$
by STAR, Eur. Phys. J. C 61 (2009) 629 [arXiv:0809.1419] [INSPIRE].
Cited by
105 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献