Centrality dependence of ψ(2S) suppression in p-Pb collisions at root sNN= 5.02 TeV

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F16%3A00301116" target="_blank" >RIV/68407700:21340/16:00301116 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1007/JHEP06(2016)050" target="_blank" >http://dx.doi.org/10.1007/JHEP06(2016)050</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/JHEP06(2016)050" target="_blank" >10.1007/JHEP06(2016)050</a>

Result language

angličtina

Original language name

Centrality dependence of ψ(2S) suppression in p-Pb collisions at root sNN= 5.02 TeV

Original language description

The inclusive production of the ψ(2S) charmonium state was studied as a function of centrality in p-Pb collisions at the nucleon-nucleon center of mass energy root s<inf>NN</inf> = 5.02 TeV at the CERN LHC. The measurement was performed with the ALICE detector in the center of mass rapidity ranges -4.46 &lt; y<inf>cms</inf>&lt; -2.96 and 2.03 &lt; y<inf>cms</inf>&lt; 3.53, down to zero transverse momentum, by reconstructing the ψ(2S) decay to a muon pair. The ψ(2S) production cross section σ<inf>ψ(2S)</inf> is presented as a function of the collision centrality, which is estimated through the energy deposited in forward rapidity calorimeters. The relative strength of nuclear effects on the ψ(2S) and on the corresponding 1S charmonium state J/ψ is then studied by means of the double ratio of cross sections [σ<inf>ψ(2S)</inf>/σ<inf>J/ψ</inf>]<inf>pPb</inf>/[σ<inf>ψ(2S)</inf>/σ<inf>J/ψ</inf>]<inf>pp</inf> between p-Pb and pp collisions, and by the values of the nuclear modification factors for the two charmonium states. The results show a large suppression of ψ(2S) production relative to the J/ψ at backward (negative) rapidity, corresponding to the flight direction of the Pb-nucleus, while at forward (positive) rapidity the suppressions of the two states are comparable. Finally, comparisons to results from lower energy experiments and to available theoretical models are presented.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BG - Nuclear, atomic and molecular physics, accelerators

OECD FORD branch

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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)<br>S - Specificky vyzkum na vysokych skolach

Publication year

2016

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

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Volume of the periodical

2016

Issue of the periodical within the volume

6

Country of publishing house

DE - GERMANY

Number of pages

23

Pages from-to

1-23

UT code for WoS article

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EID of the result in the Scopus database

2-s2.0-84977160646