Centrality dependence of (sic)(2S) suppression in p-Pb collisions at root s(NN)= 5.02 TeV

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F16%3A00466536" target="_blank" >RIV/68378271:_____/16:00466536 - isvavai.cz</a>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

Centrality dependence of (sic)(2S) suppression in p-Pb collisions at root s(NN)= 5.02 TeV

Popis výsledku v původním jazyce

The inclusive production of the Psi(2S) charmonium state was studied as a function of centrality in p-Pb collisions at the nucleon-nucleon center of mass energy root sNN = 5.02 TeV at the CERN LHC. The measurement was performed with the ALICE detector in the center of mass rapidity ranges 4.46 < ycms< 2.96 and 2.03 < ycms< 3.53, down to zero transverse momentum, by reconstructing the Psi(2S) decay to a muon pair. The Psi(2S) production cross section Sigma Psi(2S) 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 Psi(2S) and on the corresponding 1S charmonium state J/Psi is then studied by means of the double ratio of cross sections [Sigma Psi(2S)/Sigma J/Psi]pPb/[Sigma Psi(2S)/Sigma J/Psi]pp 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 Psi(2S) production relative to the J/Psi 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.

Název v anglickém jazyce

Centrality dependence of (sic)(2S) suppression in p-Pb collisions at root s(NN)= 5.02 TeV

Popis výsledku anglicky

The inclusive production of the Psi(2S) charmonium state was studied as a function of centrality in p-Pb collisions at the nucleon-nucleon center of mass energy root sNN = 5.02 TeV at the CERN LHC. The measurement was performed with the ALICE detector in the center of mass rapidity ranges 4.46 < ycms< 2.96 and 2.03 < ycms< 3.53, down to zero transverse momentum, by reconstructing the Psi(2S) decay to a muon pair. The Psi(2S) production cross section Sigma Psi(2S) 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 Psi(2S) and on the corresponding 1S charmonium state J/Psi is then studied by means of the double ratio of cross sections [Sigma Psi(2S)/Sigma J/Psi]pPb/[Sigma Psi(2S)/Sigma J/Psi]pp 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 Psi(2S) production relative to the J/Psi 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.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BF - Elementární částice a fyzika vysokých energií

OECD FORD obor

—

Projekt

<a href="/cs/project/LG13031" target="_blank" >LG13031: Spolupráce ČR s CERN</a><br>

Návaznosti

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

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název periodika

Journal of High Energy Physics

ISSN

1126-6708

e-ISSN

—

Svazek periodika

2016

Číslo periodika v rámci svazku

6

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

23

Strana od-do

—

Kód UT WoS článku

000399409300001

EID výsledku v databázi Scopus

2-s2.0-84977160646