# Quark Matter 2012

12-18 August 2012
US/Eastern timezone

## Late Result - Ds RAA from ALICE

15 Aug 2012, 12:20
20m
Regency 2/3 ()

### Regency 2/3

Oral Presentation

### Speaker

Gian Michele Innocenti (Universita e INFN (IT))

### Description

The measurement of heavy-flavour production provides insights on the properties of the high-density QCD medium created in heavy-ion collisions. In particular, the comparison of charm production in pp and in Pb-Pb collisions allows to study the mechanism of in-medium energy loss of heavy quarks. Furthermore, since strange quarks are abundant in the medium, the relative yield of D+s mesons with respect to non-strange charm mesons (D0 and D+) is predicted to be largely enhanced if in-medium hadronization is the dominant mechanism for charm hadron formation in the low momentum region. We will present the measurement of the D+s production in pp collisions at sqrt{s} = 7 TeV and in Pb-Pb collisions at sqrt{s_NN} =2.76 TeV performed with the ALICE detector at central rapidity through the exclusive reconstruction of the hadronic decay channel D+s --> Phi pi+ --> K+K-pi+. The ratios between the yields of D+s and non-strange D mesons as a function of the transverse momentum will be shown for both pp and Pb-Pb collisions.

 Slides

Paper files: