Münster 2011 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 64: Schwerionenkollisionen und QCD Phasen VIII

HK 64.2: Gruppenbericht

Freitag, 25. März 2011, 14:30–15:00, HS1

Electrons from heavy flavour decays with the ALICE experiment in proton-proton collisions at √s= 7TeV — •Raphaelle Bailhache — Institut für Kernphysik, Universität Frankfurt, Germany

Measurements of charm (cc) and bottom (bb) production in proton-proton (pp) collisions serve as an important baseline for studies in heavy-ion collisions and allow to test pQCD calculations. Next-to-leading order calculations have still a factor two uncertainty at the energies reached by the Large Hadron Collider (LHC). The heavy quark production cross-sections can be measured by identifying single leptons from semi-leptonic heavy flavor hadron decays. In 2010, pp collisions at √s=7 TeV have been recorded by ALICE at the LHC at CERN. In this talk we will focus on the measurement of an inclusive electron p_T spectrum in pp collisions at 7 TeV with the central barrel of ALICE. Electrons are identified using the Time Projection Chamber and the Time Of Flight Detector. The fully corrected electron spectrum is presented and compared to a cocktail of electrons from known hadronic decays and photon conversions to extract the contributions of open-charm and open-beauty hadron decays. Perspectives for future measurement including the Transition Radiation Detector and the Electro-Magnetic Calorimeter will be discussed.