Measurement of jet pT spectra and RAA in pp and Pb-Pb collisions at √SNN=2.76 TeV with the ALICE detector

被引：3
|
作者：
Aiola, Salvatore [1 ]
机构：
[1] Yale Univ, New Haven, CT 06520 USA
来源：
NUCLEAR PHYSICS A | 2014年 / 931卷
关键词：
QGP; Jets; Heavy-ion;
D O I：
10.1016/j.nuclphysa.2014.08.033
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
Hard-scattered partons provide an ideal probe for the study of the Quark-Gluon Plasma because they are produced prior to the formation of the QCD medium in heavy-ion collisions. Jet production is therefore susceptible to modifications induced by the presence of the medium ("jet quenching"). Both RHIC and LHC experiments have provided compelling evidence of jet quenching. Jets are reconstructed in ALICE utilizing the central tracking system for the charged constituents and the Electromagnetic Calorimeter for the neutral constituents. Jet spectra are reported for central (0-10%) and semi-central (10-30%) Pb-Pb events at root S-NN = 2.76 TeV. The nuclear modification factor, determined using a pp baseline measured at the same collisional energy, shows a strong suppression of jet production in central Pb-Pb collisions with the expected centrality ordering. Observations are in qualitative agreement with medium-induced energy loss models. Furthermore, indication of a path-length dependence of jet suppression is inferred from measurements of the yields relative to the orientation of the event plane. (C) 2014 CERN. Published by Elsevier B.V. All rights reserved.
引用
收藏
页码：382 / 387
页数：6
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