Perspectives for the study of charm in-medium quenching at the LHC with ALICE

Details Perspectives for the study of charm in-medium quenching at the LHC with ALICE Perspectives for the study of charm in-medium quenching at the LHC with ALICE

2003-12-04

arxiv.org/abs/nucl-ex/0312005v2

Eur.Phys.J. C33 (2004) 495-503

Physics

Nuclear Physics

Nuclear Experiment

10 pages, 9 figures, replaced with published version

Scientific paper

10.1140/epjc/s2004-01645-4

Charm mesons produced in nucleus-nucleus collisions are expected to be less attenuated (quenched) by the medium than hadrons containing only light quarks, since radiative energy loss of heavy quarks should be reduced by the `dead-cone' effect. We start from a published energy-loss model to derive the quenching for D mesons at the LHC, introducing an approximation of the dead-cone effect and employing a Glauber-based description of the geometry of central Pb-Pb collisions to estimate the in-medium path lengths of c quarks. We show that the exclusive reconstruction of D^0 \to K\pi decays in ALICE allows to measure the nuclear modification factor of the D mesons transverse momentum distribution and the D/(charged hadrons) ratio and, thus, to investigate the energy loss of c quarks.

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