D+s production at central rapidity in pp collisions at = 7 TeV and in Pb–Pb collisions at = 2.76 TeV with the ALICE detector

Abstract

We present the measurements of the D+s production in pp collisions at = 7 TeV and in Pb-Pb collisions at = 2.76 TeV performed in the central rapidity region with the ALICE detector through the reconstruction of the hadronic decay channel D+s → ϕπ+ → K+K−π+. The ratios of the yields of D+s and non-strange D mesons as a function of the transverse momentum are also shown for both pp and Pb-Pb collisions.