Speaker
Dr
XINYE PENG
(CCNU)
Description
Heavy quarks (charm and beauty) are a powerful probe of the Quark-Gluon Plasma (QGP) formed in high-energy heavy-ion collisions. They are produced in hard scattering processes on a timescale shorter than the QGP formation time and experience the whole system evolution. The measurement of the nuclear modification factor (RAA) of open heavy flavours can provide important information about the microscopic interactions of heavy quarks with the medium constituents, in particular on the colour-charge and parton-mass dependence of heavy-quark energy loss. The measurements of the elliptic flow (v2) at low pT can give insight into the participation of the heavy quarks to the collective expansion of the system and their thermalization in the medium. These two observables can also help in understanding possible modifications of heavy-quark hadronisation in the medium. In particular, the role of the recombination mechanism can be studied for charm via the comparison of D mesons without strange-quark content with D+s and charm baryons. The measurements in pp collisions provide critical tests of models of charm hadronisation in vacuum. In this talk, the latest results on pT-differential RAA and v2 of D mesons measured at mid-rapidity in Pb-Pb collisions with ALICE will be presented. The pT-differential cross section of the non-prompt D0 in pp collisions will be presented.
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Primary author
Dr
XINYE PENG
(CCNU)
