Measurement of prompt D-s(+)-meson production and azimuthal anisotropy in Pb-Pb collisions at root s(NN)=5.02 TeV

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F22%3A00363478" target="_blank" >RIV/68407700:21340/22:00363478 - isvavai.cz</a>

Result on the web

<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>

Result language

angličtina

Original language name

Measurement of prompt D-s(+)-meson production and azimuthal anisotropy in Pb-Pb collisions at root s(NN)=5.02 TeV

Original language description

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. (c) 2022 European Organization for Nuclear Research, ALICE. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativec

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

10303 - Particles and field physics

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

2022

Confidentiality

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

Name of the periodical

Physics Letters B

ISSN

0370-2693

e-ISSN

1873-2445

Volume of the periodical

827

Issue of the periodical within the volume

Apr

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

17

Pages from-to

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UT code for WoS article

000820935000037

EID of the result in the Scopus database

2-s2.0-85125599741