Bottomonium production in pp, pPb and PbPb collisions with CMS

被引：3

作者：

Abdulsalam, Abdulla ^{[1
]}

机构：

[1] Bhabha Atom Res Ctr, Bombay 400085, Maharashtra, India

来源：

NUCLEAR PHYSICS A | 2014年 / 931卷

基金：

英国科学技术设施理事会;

关键词：

CMS; Qurakonia; Bottomonium; Heavy-ion; pPb; PbPb;

D O I：

10.1016/j.nuclphysa.2014.10.039

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：

Bottomonia are important probes of the quark-gluon plasma since they are produced at early times and propagate through the medium, mapping its evolution. The three Upsilon states (1S, 2S, 3S) are measured separately using the Compact Muon Solenoid (CMS) experimental apparatus and were observed to disappear sequentially in PbPb collisions at 2.76 TeV. However, recent measurements in pp and pPb collisions, at 2.76 and 5.02 TeV respectively, show a surprising dependence of the excited (2S or 3S) over the ground (1S) state ratio, as a function of the global event activity. The three states are also observed to be individually more produced in events with more activity, for the three collision systems. The latest results from pp, pPb and PbPb collisions are presented in this paper. (C) 2014 CERN. Published by Elsevier B.V. All rights reserved.

引用

页码：649 / 653

页数：5

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