Centrality dependence of high-p(T) D meson suppression in Pb-Pb collisions at root s(NN)=2.76 TeV

J Adam, D. Adamova, M.M. Aggarwal, G. Aglieri Rinella, A. Agnello, N. Agrawal, Z. Ahammed, S.U. Ahn, I. Aimo, S. Aiola, Ian Bearden, Hans Bøggild, Christian Holm Christensen, Kristjan Herlache Gulbrandsen, Jens Jørgen Gaardhøje, Børge Svane Nielsen, Alexander Colliander Hansen, Ante Bilandzic, Marek Chojnacki, Valentina ZaccoloYou Zhou, Christian Alexander Bourjau, Lais Ozelin de Lima Pimentel, Katarina Gajdosova, Vojtech Pacik

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Abstract

Abstract: The nuclear modification factor, RAA, of the prompt charmed mesons D0, D+ and D∗+, and their antiparticles, was measured with the ALICE detector in Pb-Pb collisions at a centre-of-mass energy sNN=2.76(Formula presented.) TeV in two transverse momentum intervals, 5 < pT< 8 GeV/c and 8 < pT< 16 GeV/c, and in six collision centrality classes. The RAA shows a maximum suppression of a factor of 5-6 in the 10% most central collisions. The suppression and its centrality dependence are compatible within uncertainties with those of charged pions. A comparison with the RAA of non-prompt J/ψ from B meson decays, measured by the CMS Collaboration, hints at a larger suppression of D mesons in the most central collisions.[Figure not available: see fulltext.]

OriginalsprogEngelsk
Artikelnummer205
TidsskriftJournal of High Energy Physics
Vol/bind2015
Udgave nummer11
ISSN1126-6708
DOI
StatusUdgivet - 1 nov. 2015

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