Darmstadt 2016 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
HK: Fachverband Physik der Hadronen und Kerne
HK 40: Heavy Ion Collision and QCD Phases IX
HK 40.6: Vortrag
Mittwoch, 16. März 2016, 18:00–18:15, S1/01 A01
Separation of the Charm- and Beauty Production in p–Pb and Pb–Pb Collisions With ALICE — •Martin Völkl for the ALICE collaboration — Physikalisches Institut, Heidelberg
In heavy-ion collisions the energy loss of heavy quarks is an interesting quantity for the investigation of the roperties of the Quark-Gluon Plasma (QGP). Heavy quarks are produced almost exclusively in the initial hard interactions. Thus, they can interact with the surrounding matter throughout its evolution. A comparison of measurements in Pb–Pb and p–Pb collisions helps to separate initial- and final-state effects. The excellent particle identification properties of the ALICE detector and the large branching ratio (≈10%) to a final state containing electrons suggest a measurement using semileptonic decay channels. In the analyses presented here, the contributions from charm and beauty are separated statistically using their different impact parameter distributions and empirical estimations of the background. The impact parameter for electrons from hadrons containing a beauty quark is typically larger due to the larger decay length (cτ≈500µ m) of these hadrons. Here, the current results of the analyses of p–Pb at √sNN=5.02 TeV and Pb–Pb at √sNN=2.76 TeV are presented.