Abstract
The measurement of D meson production provides key tests for parton energy-loss models, which predict that charm quarks should experience less in-medium energy loss than light quarks and gluons. The ALICE experiment has measured the production of prompt D 0 , D + and D ⁎ + mesons in pp and Pb–Pb collisions at the LHC at s = 7 and 2.67 TeV and at s NN = 2.76 TeV , respectively, via the exclusive reconstruction of their hadronic decay. The p T -differential production yields in the range 2 < p T < 16 GeV / c at central rapidity, | y | < 0.5 , were used to calculate the nuclear modification factor. A suppression of a factor 3 to 4 for transverse momenta larger than 5 GeV / c in the 20% most central collisions was observed. Preliminary results in an extended p T -range, using the data sample collected during the 2011 Pb–Pb run, together with the first measurement of D s + nuclear modification factor will be shown.
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