Measurements of the heavy-flavour nuclear modification factor in p-Pb collisions at $\sqrt{s_{\rm NN}}$ = 5.02 TeV with ALICE at the LHC

19 May 2014, 15:00
platinum (darmstadtium)



Schlossgraben 1 64283 Darmstadt Germany
Contributed Talk Open Heavy Flavour and Quarkonia Heavy flavor


Shuang Li (Univ. Blaise Pascal Clermont-Fe. II (FR))


The LHC heavy-ion physics program aims at investigating the properties of strongly interacting matter at extreme conditions of temperature and energy density, where the formation of the Quark-Gluon Plasma (QGP) is expected. In high-energy heavy-ion collisions, heavy quarks are regarded as effective probes of the properties of the QGP as they are created on a short time scale, with respect to that of the QGP, and subsequently interact with it. The nuclear modification factor $R_{\rm AA}$, defined as the ratio of the yield measured in Pb-Pb to that observed in pp collisions scaled with the number of binary nucleon-nucleon collisions, is used to study the mechanisms of heavy quark in-medium energy loss and hadronization. In order to disantangle hot and cold nuclear matter effects, the nuclear modification factor was measured in p-Pb collisions where the formation of a large volume hot and dense medium is not expected. Heavy-flavour production in p-Pb collisions has also its own interest since it allows us to investigate initial state effects such as modifications of the parton distribution functions in the nucleus, gluon saturation and $k_{\rm T}$ broadening. With ALICE, the detector designed and optimized for heavy-ion physics at the LHC, open heavy flavours are measured at central rapidity using using their hadronic and semi-electronic decays as well as at forward and backward rapidity using their semi-muonic decays. The latest results on the nuclear modification factor of charmed mesons and electrons and muons from heavy-flavour hadron decays in p-Pb collisions at $\sqrt{s_{\rm NN}}$ = 5.02 TeV will be presented. Comparisons with theoretical predictions will be discussed.
On behalf of collaboration: ALICE

Primary author

Shuang Li (Univ. Blaise Pascal Clermont-Fe. II (FR))

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