Frankfurt 2014 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 12: Schwerionenkollisionen und QCD Phasen
HK 12.4: Vortrag
Montag, 17. März 2014, 17:30–17:45, HZ 6
Measurement of electrons from charm and beauty-hadron decays in p-Pb collisions at √sNN = 5.02 TeV with ALICE at the LHC — •Jan Wagner for the ALICE collaboration — Research Division and ExtreMe Matter Institute EMMI, Planckstraße 1, 64291 Darmstadt — Institut für Kernphysik, Technische Universität Darmstadt, Schlossgrabenstr. 9, 64289 Darmstadt
Electrons from inclusive semileptonic heavy-flavor hadron decays are used to measure charm and beauty production. Because of their large masses, heavy quarks are mostly produced in initial hard partonic interactions and thus can be used to probe a medium created in heavy-ion collisions.
In heavy-ion collisions the pt-differential heavy-flavor yields are sensitive to initial state effects of the colliding nuclei (e.g. shadowing, saturation) and to the interaction of the heavy quarks with the hot and dense medium. To distinguish these effects from each other a reference measurement using p-Pb collisions is necessary, where only initial state effects play a role.
The status of the analysis of semi-electronic heavy-flavor decays at midrapidity from p–Pb collisions at √sNN = 5.02 TeV using the ALICE apparatus will be presented. RpPb will be shown together with predictions of shadowing effects calculated on the basis of the EPS09 parametrization. The method of separating the charm and beauty contributions from each other will be explained and an outlook to upcoming results will be given.