Relative Modification of Prompt ψ(2S) and J/ψ Yields from pp to PbPb Collisions at √s N N = 5.02     TeV

A. M. Sirunyan; Hugues Brun; Barbara Clerbaux; Gilles Lentdecker; Hugo Delannoy; Giuseppe Fasanella; Laurent Favart; Reza Goldouzian; Anastasia Grebenyuk; Georgia Karapostoli; Thomas Lenzi; Alexandre Leonard; Jelena Luetic; Thierry Maerschalk; Audrey Marinov; Aidan Sean Randle-Conde; Tomislav Seva; Catherine Vander Velde; Pascal Vanlaer; David Vannerom; Ryo Yonamine; Florian Zenoni; Fengwangdong Zhang; Wenxing Fang; Brian Dorney; Qun Wang; Yasar Onel; CMS Collaboration

doi:10.1103/PHYSREVLETT.118.162301

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Relative Modification of Prompt ψ(2S) and J/ψ Yields from pp to PbPb Collisions at √s N N = 5.02 TeV

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Relative Modification of Prompt ψ(2S) and J/ψ Yields from pp to PbPb Collisions at √s N N = 5.02 TeV

A. M. Sirunyan, Hugues Brun, Barbara Clerbaux, Gilles Lentdecker, Hugo Delannoy, Giuseppe Fasanella, Laurent Favart, Reza Goldouzian, Anastasia Grebenyuk, Georgia Karapostoli, …

Physical review letters, Vol.118(16), 162301

04/20/2017

DOI: 10.1103/PHYSREVLETT.118.162301

PMID: 28474955

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Abstract

The relative modification of the prompt psi(2S) and J/psi yields from pp to PbPb collisions, at the center-of- mass energy of 5.02 TeV per nucleon pair, is presented. The analysis is based on pp and PbPb data samples collected by the CMS experiment at the LHC in 2015, corresponding to integrated luminosities of 28.0 pb(-1) and 464 mu b(-1), respectively. The double ratio of measured yields of prompt charmonia reconstructed through their decays into muon pairs,(N-psi(2S)/N J/psi )(PbPb)/(N-psi((2S))/N (J/psi) )(pp),is determined as a function of PbPb collision centrality and charmonium transverse momentum p(T), in two kinematic intervals: broken vertical bar y vertical bar < 1.6 covering 6.5 < pT < 30 GeV/c and 1.6 < broken vertical bar y vertical bar < 2.4 covering 3 < pT < 30 GeV/c. The centrality-integrated double ratios are 0.36 +/- 0.08(stat) +/- 0.05(syst) in the first interval and 0.24 +/- 0.22(stat) +/- 0.09(syst) in the second. The double ratio is lower than unity in all the measured bins, suggesting that the psi(2S) yield is more suppressed than the J/psi yield in the explored phase space.

Astronomy

High Energy Physics

Nuclear Physics

Particle Physics

Physical Sciences

Physics

02 Physical Sciences

114 Physical sciences

Astronomy (all)

CMS collaboration

Compact Muon Solenoid

Experiment

General Physics

hep

Large Hadron Collider (LHC)

Multidisciplinary

nucl

Nuclear Experiment

Physique des particules élémentaires

Quarkonium

relativistic heavy ion collisions

Science & Technology

ψ physics

Details

Title: Subtitle: Relative Modification of Prompt ψ(2S) and J/ψ Yields from pp to PbPb Collisions at √s N N = 5.02 TeV
Creators: A. M. Sirunyan
Hugues Brun
Barbara Clerbaux
Gilles Lentdecker
Hugo Delannoy
Giuseppe Fasanella
Laurent Favart
Reza Goldouzian
Anastasia Grebenyuk
Georgia Karapostoli
Thomas Lenzi
Alexandre Leonard
Jelena Luetic
Thierry Maerschalk
Audrey Marinov
Aidan Sean Randle-Conde
Tomislav Seva
Catherine Vander Velde
Pascal Vanlaer
David Vannerom
Ryo Yonamine
Florian Zenoni
Fengwangdong Zhang
Wenxing Fang
Brian Dorney
Qun Wang
Yasar Onel (Contributor) - Physics and Astronomy
CMS Collaboration
Resource Type: Journal article
Publication Details: Physical review letters, Vol.118(16), 162301
DOI: 10.1103/PHYSREVLETT.118.162301
PMID: 28474955
NLM abbreviation: Phys Rev Lett
ISSN: 0031-9007
eISSN: 1079-7114
Publisher: American Physical Society (APS)
Grant note: 665779 / European Commission (ec__________::EC)
Language: English
Date published: 04/20/2017
Academic Unit: Physics and Astronomy
Record Identifier: 9984428801902771

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