The production of prompt charmed mesons D-0, D+ and D*(+), and their antiparticles, was measured with the ALICE detector in Pb-Pb collisions at the centre-of-mass energy per nucleon pair, root s(NN), of 2.76 TeV. The production yields for rapidity vertical bar y vertical bar < 0.5 are presented as a function of transverse momentum, p(T), in the interval 1-36 GeV/c for the centrality class 0-10% and in the interval 1-16 GeV/c for the centrality class 30-50%. The nuclear modification factor R-AA was computed using a proton-proton reference at root s = 2.76 TeV, based on measurements at root s = 7 TeV and on theoretical calculations. A maximum suppression by a factor of 5-6 with respect to binary-scaled pp yields is observed for the most central collisions at p(T) of about 10 GeV/c. A suppression by a factor of about 2-3 persists at the highest p(T) covered by the measurements. At low p(T) (1-3 GeV/c), the R-AA has large uncertainties that span the range 0.35 (factor of about 3 suppression) to 1 (no suppression). In all p(T) intervals, the R-AA is larger in the 30-50% centrality class compared to central collisions. The D-meson R-AA is also compared with that of charged pions and, at large p(T), charged hadrons, and with model calculations.

Transverse momentum dependence of D-meson production in Pb-Pb collisions at root S-NN=2.76 TeV

CASULA, ESTER ANNA RITA;Cicalo, C.;DE FALCO, ALESSANDRO;FIONDA, FIORELLA MARIA CELESTE;USAI, GIANLUCA;
2016-01-01

Abstract

The production of prompt charmed mesons D-0, D+ and D*(+), and their antiparticles, was measured with the ALICE detector in Pb-Pb collisions at the centre-of-mass energy per nucleon pair, root s(NN), of 2.76 TeV. The production yields for rapidity vertical bar y vertical bar < 0.5 are presented as a function of transverse momentum, p(T), in the interval 1-36 GeV/c for the centrality class 0-10% and in the interval 1-16 GeV/c for the centrality class 30-50%. The nuclear modification factor R-AA was computed using a proton-proton reference at root s = 2.76 TeV, based on measurements at root s = 7 TeV and on theoretical calculations. A maximum suppression by a factor of 5-6 with respect to binary-scaled pp yields is observed for the most central collisions at p(T) of about 10 GeV/c. A suppression by a factor of about 2-3 persists at the highest p(T) covered by the measurements. At low p(T) (1-3 GeV/c), the R-AA has large uncertainties that span the range 0.35 (factor of about 3 suppression) to 1 (no suppression). In all p(T) intervals, the R-AA is larger in the 30-50% centrality class compared to central collisions. The D-meson R-AA is also compared with that of charged pions and, at large p(T), charged hadrons, and with model calculations.
2016
Heavy ion experiments; Quark gluon plasma; Charm physics; Heavy-ion collisions; Energy-loss; Root-S(NN)=2.76 TEV; QCD matter; LHC; Flavor; Charm; Protons; Model; Flow
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11584/189213
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 99
  • ???jsp.display-item.citation.isi??? 116
social impact