Naslov
Transverse momentum dependence of D-meson production in Pb-Pb collisions at √sNN=2.76 TeV

Autori
Adam, J. ; ... ; Antičić, Tome ; ... ; Erhardt, Filip ; ... ; Gotovac, Sven ; ... ; Mudnić, Eugen ; ... ; Planinić, Mirko ; ... ; Poljak, Nikola ; ... ; Simatović, Goran ; ... ; Utrobičić, Antonija ; ... ; Vicković, Linda ; ... ; Zyzak, M.

Kolaboracija
ALICE Collaboration

Izvornik
The Journal of high energy physics (1126-6708) 2016 (2016), 3; 081, 43

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
transverse momentum ; D-meson ; lead-lead

Sažetak
The production of prompt charmed mesons D0, 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, √sNN, of 2.76 TeV. The production yields for rapidity |y|< 0.5 are presented as a function of transverse momentum, pT, 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 RAA was computed using a proton-proton reference at √s=2.76 TeV, based on measurements at √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 pT of about 10 GeV/c. A suppression by a factor of about 2- 3 persists at the highest pT covered by the measurements. At low pT (1-3 GeV/c), the RAA has large uncertainties that span the range 0.35 (factor of about 3 suppression) to 1 (no suppression). In all pT intervals, the RAA is larger in the 30-50% centrality class compared to central collisions. The D-meson RAA is also compared with that of charged pions and, at large pT, charged hadrons, and with model calculations.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA