# Quark Matter 2012

12-18 August 2012
US/Eastern timezone

## ${\rm D^+}$ meson production in p-p and Pb-Pb collisions with the ALICE detector

16 Aug 2012, 16:00
2h

Poster Heavy flavor and quarkonium production

### Speaker

Riccardo Russo (Universita e INFN (IT))

### Description

Open heavy flavour hadrons produced in high-energy ion collisions are an interesting tool to investigate the properties of the QCD medium, as they come from the hadronization of heavy quarks which are created in the early stage of the interaction and which experience the whole collision history. Energy loss of heavy quarks in the medium can be investigated by comparing the heavy flavour production cross sections in p-p and nucleus-nucleus collisions. The measurement of ${\rm D^+}$ production as a function of transverse momentum in p-p and Pb-Pb collisions at $\sqrt{s}_{NN}$ = 7 and 2.76 TeV respectively with the ALICE detector is presented. ${\rm D^+}$ mesons are reconstructed from their $K^- \pi^+ \pi^+$ hadronic decay that can be reconstructed in the central rapidity region using the tracking and PID detectors. Charm production cross sections in p-p collision is compared to pQCD predictions and the nuclear modification factor of ${\rm D^+}$ is presented.

### Primary author

Collaboration ALICE (CERN, Geneva,Switzerland)

### Co-author

Riccardo Russo (Universita e INFN (IT))

 Poster