Charm mesons suppression in lead-lead collisions

by Andrea Dainese. Published: 27 June 2011

The ALICE experiment has measured the production of the charmed mesons D0 and D+ in Pb-Pb collisions at the LHC. In central (head-on) collisions, a large suppression with respect to expectations is observed at large transverse momentum pt, indicating that charm quarks undergo a strong energy loss in the hot and dense state of QCD matter formed in these collisions. D meson suppression is measured for the first time directly in central nucleus-nucleus collisions.