Measurement of prompt Ds+-meson production and azimuthal anisotropy in Pb-Pb collisions at √sNN = 5.02 TeV

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F22%3A00559782" target="_blank" >RIV/68378271:_____/22:00559782 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61389005:_____/22:00559782

Výsledek na webu

<a href="https://doi.org/10.1016/j.physletb.2022.136986" target="_blank" >https://doi.org/10.1016/j.physletb.2022.136986</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.physletb.2022.136986" target="_blank" >10.1016/j.physletb.2022.136986</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Measurement of prompt Ds+-meson production and azimuthal anisotropy in Pb-Pb collisions at √sNN = 5.02 TeV

Popis výsledku v původním jazyce

The production yield and angular anisotropy of prompt D-s(+) mesons were measured as a function of transverse momentum (p(T)) in Pb-Pb collisions at a centre-of-mass energy per nucleon pair root s(NN) = 5.02 TeV collected with the ALICE detector at the LHC. D-s(+) mesons and their charge conjugates were reconstructed at midrapidity (vertical bar y vertical bar < 0.5) from their hadronic decay channel D-s(+) -> phi pi(+), with phi -> K-K+, in the p(T) intervals 2 < p(T) < 50 GeV/c and 2 < p(T) < 36 GeV/c for the 0-10% and 30-50% centrality intervals. For p(T) > 10 GeV/c, the measured D-s(+)-meson nuclear modification factor R-AA is consistent with the one of non-strange D mesons within uncertainties, while at lower p(T) a hint for a D-s(+)-meson R-AA larger than that of non-strange D mesons is seen. The enhanced production of D-s(+) relative to non-strange D mesons is also studied by comparing the p(T)-dependent D-s(+)/D-0 production yield ratios in Pb-Pb and in pp collisions. The ratio measured in Pb-Pb collisions is found to be on average higher than that in pp collisions in the interval 2 < p(T) < 8 GeV/c with a significance of 2.3 sigma and 2.4 sigma for the 0-10% and 30-50% centrality intervals. The azimuthal anisotropy coefficient v(2) of prompt D-s(+) mesons was measured in Pb-Pb collisions in the 30-50% centrality interval and is found to be compatible with that of non-strange D mesons. The main features of the measured R-AA, D-s(+)/D-0 ratio, and v(2) as a function of p(T) are described by theoretical calculations of charm-quark transport in a hydrodynamically expanding quark-gluon plasma including hadronisation via charm-quark recombination with light quarks from the medium. The p(T)-integrated production yield of D-s(+) mesons is compatible with the prediction of the statistical hadronisation model.

Název v anglickém jazyce

Measurement of prompt Ds+-meson production and azimuthal anisotropy in Pb-Pb collisions at √sNN = 5.02 TeV

Popis výsledku anglicky

The production yield and angular anisotropy of prompt D-s(+) mesons were measured as a function of transverse momentum (p(T)) in Pb-Pb collisions at a centre-of-mass energy per nucleon pair root s(NN) = 5.02 TeV collected with the ALICE detector at the LHC. D-s(+) mesons and their charge conjugates were reconstructed at midrapidity (vertical bar y vertical bar < 0.5) from their hadronic decay channel D-s(+) -> phi pi(+), with phi -> K-K+, in the p(T) intervals 2 < p(T) < 50 GeV/c and 2 < p(T) < 36 GeV/c for the 0-10% and 30-50% centrality intervals. For p(T) > 10 GeV/c, the measured D-s(+)-meson nuclear modification factor R-AA is consistent with the one of non-strange D mesons within uncertainties, while at lower p(T) a hint for a D-s(+)-meson R-AA larger than that of non-strange D mesons is seen. The enhanced production of D-s(+) relative to non-strange D mesons is also studied by comparing the p(T)-dependent D-s(+)/D-0 production yield ratios in Pb-Pb and in pp collisions. The ratio measured in Pb-Pb collisions is found to be on average higher than that in pp collisions in the interval 2 < p(T) < 8 GeV/c with a significance of 2.3 sigma and 2.4 sigma for the 0-10% and 30-50% centrality intervals. The azimuthal anisotropy coefficient v(2) of prompt D-s(+) mesons was measured in Pb-Pb collisions in the 30-50% centrality interval and is found to be compatible with that of non-strange D mesons. The main features of the measured R-AA, D-s(+)/D-0 ratio, and v(2) as a function of p(T) are described by theoretical calculations of charm-quark transport in a hydrodynamically expanding quark-gluon plasma including hadronisation via charm-quark recombination with light quarks from the medium. The p(T)-integrated production yield of D-s(+) mesons is compatible with the prediction of the statistical hadronisation model.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10303 - Particles and field physics

Projekt

<a href="/cs/project/LTT17018" target="_blank" >LTT17018: Získávání nových poznatků o mikrosvětě v infrastruktuře CERN</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Název periodika

Physics Letters. B

ISSN

0370-2693

e-ISSN

1873-2445

Svazek periodika

827

Číslo periodika v rámci svazku

APR

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

17

Strana od-do

136986

Kód UT WoS článku

000820935000037

EID výsledku v databázi Scopus

2-s2.0-85125599741