The production of the prompt charm mesons D0, D+, D∗+, and their antiparticles, was measured with the ALICE detector in Pb-Pb collisions at the LHC, at a centre-of-mass energy √s_NN=2.76 TeV per nucleon--nucleon collision. The pt-differential production yields in the range 2<pt<16 GeV/c at central rapidity, ∣∣y∣∣<0.5, were used to calculate the nuclear modification factor RAA with respect to a proton-proton reference obtained from the cross section measured at s√=7 TeV and scaled to s√=2.76 TeV. For the three meson species, RAA shows a suppression by a factor 3-4, for transverse momenta larger than 5 GeV/c in the 20% most central collisions. The suppression is reduced for peripheral collisions.
Suppression of high transverse momentum D mesons in central Pb-Pb collisions at sqrt{s}_NN=2.76 TeV
BEOLE', Stefania;BERZANO, DARIO CARLO DOMENICO;BIANCHI, LIVIO;CORRALES MORALES, YASSER;FERRETTI, Alessandro;GAGLIARDI, Martino;GALLIO, Mauro;INNOCENTI, GIAN MICHELE;MARCHISONE, MASSIMILIANO;MASERA, Massimo;MILANO, LEONARDO;ORTONA, GIACOMO;VERCELLIN, Ermanno;
2012-01-01
Abstract
The production of the prompt charm mesons D0, D+, D∗+, and their antiparticles, was measured with the ALICE detector in Pb-Pb collisions at the LHC, at a centre-of-mass energy √s_NN=2.76 TeV per nucleon--nucleon collision. The pt-differential production yields in the range 2File | Dimensione | Formato | |
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suppression_high_mom_D_2012.pdf
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