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HK: Fachverband Physik der Hadronen und Kerne

HK 64: Schwerionenkollisionen und QCD Phasen VIII

HK 64.6: Vortrag

Freitag, 25. März 2011, 15:45–16:00, HS1

Open charm production in the D^*+ → D⁰ π⁺ decay channel with ALICE — •Yifei Wang — Physikalisches Institut, Uni Heidelberg

Heavy quarks(c, b), due to their large mass, are unique tools to study the degree of thermalization of the initially created QCD medium in high-energy nuclear collisions at LHC. Further, the calculation of the total charm production cross section remains a challenge in perturbative QCD.
LHC has been successfully delivering p+p collisions at the world’s highest center of mass energy of √s = 7 TeV in year 2010. The ALICE detector with its full azimuthal coverage at mid-rapidity and pointing resolution of 50µm at the collision vertex, is able to identify most of open charm hadrons down to lowest momenta. We present preliminary results on the spectrum of open charm production channel of D^*+ → D⁰ π⁺ (BR:68%), where D⁰ → K π⁺ (BR: 4%), and give a comparison to predictions from theory.
Depending on the progress of analysis, we will show first result on Pb+Pb data @√s_NN = 2.76 TeV.