Centrality dependence of J/ψ and ψ(2S) production and nuclear modification in p-Pb collisions at root sNN = 8.16 TeV

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F21%3A00356308" target="_blank" >RIV/68407700:21340/21:00356308 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1007/JHEP02(2021)002" target="_blank" >https://doi.org/10.1007/JHEP02(2021)002</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/JHEP02(2021)002" target="_blank" >10.1007/JHEP02(2021)002</a>

Result language

angličtina

Original language name

Centrality dependence of J/ψ and ψ(2S) production and nuclear modification in p-Pb collisions at root sNN = 8.16 TeV

Original language description

The inclusive production of the J/ψ and ψ(2S) charmonium states is studied as a function of centrality in p-Pb collisions at a centre-of-mass energy per nucleon pair sNN = 8.16 TeV at the LHC. The measurement is performed in the dimuon decay channel with the ALICE apparatus in the centre-of-mass rapidity intervals -4.46 < ycms< -2.96 (Pb-going direction) and 2.03 < ycms< 3.53 (p-going direction), down to zero transverse momentum (pT). The J/ψ and ψ(2S) production cross sections are evaluated as a function of the collision centrality, estimated through the energy deposited in the zero degree calorimeter located in the Pb-going direction. The pT-differential J/ψ production cross section is measured at backward and forward rapidity for several centrality classes, together with the corresponding average <pT> and <pT2> values. The nuclear effects affecting the production of both charmonium states are studied using the nuclear modification factor. In the p-going direction, a suppression of the production of both charmonium states is observed, which seems to increase from peripheral to central collisions. In the Pb-going direction, however, the centrality dependence is different for the two states: the nuclear modification factor of the J/ψ increases from below unity in peripheral collisions to above unity in central collisions, while for the ψ(2S) it stays below or consistent with unity for all centralities with no significant centrality dependence. The results are compared with measurements in p-Pb collisions at sNN = 5.02 TeV and no significant dependence on the energy of the collision is observed. Finally, the results are compared with theoretical models implementing various nuclear matter effects.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10301 - Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2021

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of High Energy Physics

ISSN

1029-8479

e-ISSN

1029-8479

Volume of the periodical

2021

Issue of the periodical within the volume

2

Country of publishing house

DE - GERMANY

Number of pages

35

Pages from-to

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UT code for WoS article

000616628000002

EID of the result in the Scopus database

2-s2.0-85100380531