Münster 2011 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 22: Schwerionenkollisionen und QCD Phasen IV

HK 22.9: Talk

Tuesday, March 22, 2011, 18:45–19:00, HS AP

Beauty and beauty-jet measurement via displaced vertices with ALICE in p+p collisions at √s = 7 TeV — •MinJung Kweon — Universitaet Heidelberg Physikalisches Institut, Heidelberg, Germany

The measurement of single electrons from heavy flavor hadron decays at RHIC indicates strong coupling of heavy quarks to the medium produced in ultra relativistic heavy-ion collisions. The LHC extends greatly the kinematic range to high transverse momentum which enables new tests of heavy quark jet dynamics. The beauty hadrons and jets containing beauty hadrons have distinctive properties, which allow for their clear identification. We introduce methods to preferentially select electrons from beauty hadron decays by minimum distance of closest approach cuts and by reconstructing secondary vertices. The first analysis applying these techniques in the ALICE experiment for p+p collisions at √s = 7 TeV is presented. The analysis status of the data from Pb+Pb collisions, which will allow us to understand beauty quark energy loss in the medium, is also reported.