Measurement of prompt and nonprompt charmonium suppression in PbPb collisions at 5.02 TeV

Sirunyan, A. M. and Tumasyan, A. R. and Adam, Wolfgang and Ambrogi, Federico and Asilar, Ece and Md. Ali, Mohd. Adli (2018) Measurement of prompt and nonprompt charmonium suppression in PbPb collisions at 5.02 TeV. The European Physical Journal C, 78 (6). pp. 1-27. ISSN 1434-6044 E-ISSN 1434-6052

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Abstract

The nuclear modification factors of J/ψ and ψ(2S) mesons are measured in PbPb collisions at a centre-ofmass energy per nucleon pair of √sNN = 5.02 TeV. The analysis is based on PbPb and pp data samples collected by CMS at the LHC in 2015, corresponding to integrated luminosities of 464μb−1 and 28 pb−1, respectively. The measurements are performed in the dimuon rapidity range of |y| < 2.4 as a function of centrality, rapidity, and transverse momentum (pT) from pT = 3 GeV/c in the most forward region and up to 50 GeV/c. Both prompt and nonprompt (coming from b hadron decays) J/ψ mesons are observed to be increasingly suppressed with centrality, with a magnitude similar to the one observed at √sNN = 2.76 TeV for the two J/ψ meson components. No dependence on rapidity is observed for either prompt or nonprompt J/ψ mesons. An indication of a lower prompt J/ψ meson suppression at pT > 25 GeV/c is seen with respect to that observed at intermediate pT. The prompt ψ(2S) meson yield is found to be more suppressed than that of the prompt J/ψ mesons in the entire pT range

Item Type:	Article (Journal)
Additional Information:	7861/70404
Uncontrolled Keywords:	Measurement of prompt and nonprompt charmonium; PbPb collisions; 5.02 TeV
Subjects:	Q Science > Q Science (General) Q Science > QC Physics
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Science Kulliyyah of Science > Department of Physics
Depositing User:	Dr Mohd Adli MD Ali
Date Deposited:	04 Feb 2019 09:33
Last Modified:	15 Jul 2019 09:29
URI:	http://irep.iium.edu.my/id/eprint/70404

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