Measurement of D-s(+) product ion and nuclear modification factor in Pb-Pb collisions at root S-NN=2.76 TeV

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F16%3A00459122" target="_blank" >RIV/68378271:_____/16:00459122 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61389005:_____/16:00459122 RIV/68407700:21340/16:00301037

Výsledek na webu

<a href="http://dx.doi.org/10.1007/JHEP03(2016)082" target="_blank" >http://dx.doi.org/10.1007/JHEP03(2016)082</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/JHEP03(2016)082" target="_blank" >10.1007/JHEP03(2016)082</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Measurement of D-s(+) product ion and nuclear modification factor in Pb-Pb collisions at root S-NN=2.76 TeV

Popis výsledku v původním jazyce

The production of prompt D-s(+) mesons was measured for the first time in collisions of heavy nuclei with the ALICE detector at the LHC. The analysis was performed on a data sample of Pb-Pb collisions at a centre-of-mass energy per nucleon pair, root s(NN), of 2.76 TeV in two different centrality classes, namely 0-10% and 20-50%. D-s(+) mesons and their antiparticles were reconstructed at mid-rapidity from their hadronic decay channel D-s(+) -> phi pi(+), with phi -> K-K+, in the transverse momentum intervals 4 < p(T) < 12 GeV/c and 6 < p(T) < 12 GeV/c for the 0-10% and 20-50% centrality classes, respectively. The nuclear modi fication factor R-AA was computed by comparing the p(T)-differential production yields in Pb-Pb collisions to those in proton-proton (pp) collisions at the same energy. This pp reference was obtained using the cross section measured at root s = 7 TeV and scaled to root s = 2.76TeV. The R-AA of D-s(+) mesons was compared to that of non-strange D mesons in the 10% most central Pb-Pb collisions. At high p(T) (8 < p(T) < 12 GeV/c) a suppression of the D-s(+)-meson yield by a factor of about three, compatible within uncertainties with that of non-strange D mesons, is observed. At lower p(T) (4 < p(T) < 8 GeV/c) the values of the D-s(+)-meson R-AA are larger than those of non-strange D mesons, although compatible within uncertainties. The production ratios D-s(+)/D-0 and D-s(+)/D+ were also measured in Pb-Pb collisions and compared to their values in proton-proton collisions.

Název v anglickém jazyce

Measurement of D-s(+) product ion and nuclear modification factor in Pb-Pb collisions at root S-NN=2.76 TeV

Popis výsledku anglicky

The production of prompt D-s(+) mesons was measured for the first time in collisions of heavy nuclei with the ALICE detector at the LHC. The analysis was performed on a data sample of Pb-Pb collisions at a centre-of-mass energy per nucleon pair, root s(NN), of 2.76 TeV in two different centrality classes, namely 0-10% and 20-50%. D-s(+) mesons and their antiparticles were reconstructed at mid-rapidity from their hadronic decay channel D-s(+) -> phi pi(+), with phi -> K-K+, in the transverse momentum intervals 4 < p(T) < 12 GeV/c and 6 < p(T) < 12 GeV/c for the 0-10% and 20-50% centrality classes, respectively. The nuclear modi fication factor R-AA was computed by comparing the p(T)-differential production yields in Pb-Pb collisions to those in proton-proton (pp) collisions at the same energy. This pp reference was obtained using the cross section measured at root s = 7 TeV and scaled to root s = 2.76TeV. The R-AA of D-s(+) mesons was compared to that of non-strange D mesons in the 10% most central Pb-Pb collisions. At high p(T) (8 < p(T) < 12 GeV/c) a suppression of the D-s(+)-meson yield by a factor of about three, compatible within uncertainties with that of non-strange D mesons, is observed. At lower p(T) (4 < p(T) < 8 GeV/c) the values of the D-s(+)-meson R-AA are larger than those of non-strange D mesons, although compatible within uncertainties. The production ratios D-s(+)/D-0 and D-s(+)/D+ were also measured in Pb-Pb collisions and compared to their values in proton-proton collisions.

Druh

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

CEP obor

BF - Elementární částice a fyzika vysokých energií

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

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

1029-8479

e-ISSN

—

Svazek periodika

2016

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

32

Strana od-do

—

Kód UT WoS článku

000372967800002

EID výsledku v databázi Scopus

2-s2.0-84961827489