Suppression of high transverse momentum D mesons in central Pb-Pb collisions at √sNN = 2.76 TeV

The ALICE Collaboration

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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 √sNN = 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.

Original languageEnglish
Article number112
JournalJournal of High Energy Physics
Volume2012
Issue number9
DOIs
Publication statusPublished - 2012 Sep 25

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

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