ψ(2S) Suppression in Pb-Pb Collisions at the LHC

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F24%3A00585817" target="_blank" >RIV/61389005:_____/24:00585817 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68378271:_____/24:00585817 RIV/68407700:21340/24:00377086

Výsledek na webu

<a href="https://doi.org/10.1103/PhysRevLett.132.042301" target="_blank" >https://doi.org/10.1103/PhysRevLett.132.042301</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevLett.132.042301" target="_blank" >10.1103/PhysRevLett.132.042301</a>

Jazyk výsledku

angličtina

Název v původním jazyce

ψ(2S) Suppression in Pb-Pb Collisions at the LHC

Popis výsledku v původním jazyce

The production of the psi(2S) charmonium state was measured with ALICE in Pb-Pb collisions at root s(NN) = 5.02 TeV, in the dimuon decay channel. A significant signal was observed for the first time at LHC energies down to zero transverse momentum, at forward rapidity (2.5 < y < 4). The measurement of the ratio of the inclusive production cross sections of the psi(2S) and J/psi resonances is reported as a function of the centrality of the collisions and of transverse momentum, in the region p(T) < 12 GeV/c. The results are compared with the corresponding measurements in pp collisions, by forming the double ratio [sigma(psi(2S)) /sigma(J/psi)](Pb-Pb)/[sigma(psi(2S)) /sigma(J/psi)](pp). It is found that in Pb-Pb collisions the psi(2S) is suppressed by a factor of similar to 2 with respect to the J/psi. The psi(2S) nuclear modification factor R-AA was also obtained as a function of both centrality and p(T). The results show that the psi(2S) resonance yield is strongly suppressed in Pb-Pb collisions, by a factor of up to similar to 3 with respect to pp. Comparisons of cross section ratios with previous Super Proton Synchrotron findings by the NA50 experiment and of R-AA with higher-p(T) results at LHC energy are also reported. These results and the corresponding comparisons with calculations of transport and statistical models address questions on the presence and properties of charmonium states in the quark-gluon plasma formed in nuclear collisions at the LHC.

Název v anglickém jazyce

ψ(2S) Suppression in Pb-Pb Collisions at the LHC

Popis výsledku anglicky

The production of the psi(2S) charmonium state was measured with ALICE in Pb-Pb collisions at root s(NN) = 5.02 TeV, in the dimuon decay channel. A significant signal was observed for the first time at LHC energies down to zero transverse momentum, at forward rapidity (2.5 < y < 4). The measurement of the ratio of the inclusive production cross sections of the psi(2S) and J/psi resonances is reported as a function of the centrality of the collisions and of transverse momentum, in the region p(T) < 12 GeV/c. The results are compared with the corresponding measurements in pp collisions, by forming the double ratio [sigma(psi(2S)) /sigma(J/psi)](Pb-Pb)/[sigma(psi(2S)) /sigma(J/psi)](pp). It is found that in Pb-Pb collisions the psi(2S) is suppressed by a factor of similar to 2 with respect to the J/psi. The psi(2S) nuclear modification factor R-AA was also obtained as a function of both centrality and p(T). The results show that the psi(2S) resonance yield is strongly suppressed in Pb-Pb collisions, by a factor of up to similar to 3 with respect to pp. Comparisons of cross section ratios with previous Super Proton Synchrotron findings by the NA50 experiment and of R-AA with higher-p(T) results at LHC energy are also reported. These results and the corresponding comparisons with calculations of transport and statistical models address questions on the presence and properties of charmonium states in the quark-gluon plasma formed in nuclear collisions at the LHC.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10304 - Nuclear physics

Projekt

<a href="/cs/project/LM2018104" target="_blank" >LM2018104: Výzkumná infrastruktura pro experimenty v CERN</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

Physical Review Letters

ISSN

0031-9007

e-ISSN

1079-7114

Svazek periodika

132

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

13

Strana od-do

042301

Kód UT WoS článku

001185766500006

EID výsledku v databázi Scopus

2-s2.0-85184287111