Author
Işıldak, Bora
Publication Date
2017
Publication Place
-
Elsevier
Subject
CMS, Physics, Heavy ions, Dimuons, Bottomonia
Type
Periodical
Language
English
Digital
Yes
Manuscript
No
Library
Özyeğin University
Library Asset ID
0370-2693
Record ID
13536cc1-7b45-4faf-98a4-f677501e764b
Library Location
Natural and Mathematical Sciences
Date
2017
Notes
Due to copyright restrictions, the access to the full text of this article is only available via subscription.
Sample Text
The production yields of ϒ(1S), ϒ(2S), and ϒ(3S) quarkonium states are measured through their decays
into muon pairs in the CMS detector, in PbPb and pp collisions at the centre-of-mass energy per nucleon
pair of 2.76 TeV. The data correspond to integrated luminosities of 166 μb−1 and 5.4 pb−1 for PbPb and
pp collisions, respectively. Differential production cross sections are reported as functions of ϒ rapidity
y up to 2.4, and transverse momentum pT up to 20 GeV/c. A strong centrality-dependent suppression is
observed in PbPb relative to pp collisions, by factors of up to ≈2 and 8, for the ϒ(1S) and ϒ(2S) states,
respectively. No significant dependence of this suppression is observed as a function of y or pT. The ϒ(3S)
state is not observed in PbPb collisions, which corresponds to a suppression for the centrality-integrated
data by at least a factor of ≈7 at a 95% confidence level. The observed suppression is in agreement with
theoretical scenarios modeling the sequential melting of quarkonium states in a quark gluon plasma.
DOI
10.1016/j.physletb.2017.04.031
Cilt
770
