Dresden 2013 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 3: Schwerionenkollisionen und QCD Phasen

HK 3.6: Talk

Monday, March 4, 2013, 12:30–12:45, HSZ-201

b-Jet tagging in ALICE — •Linus Feldkamp — WWU Münster

Jets from heavy quarks (charm and beauty) are ideal probes for the strongly interacting medium (Quark Gluon Plasma) produced in heavy ion collisions. Color-charged heavy quarks, produced in the very early stage of the collision, lose energy while traversing the medium due to collisional and radiative processes, with the consequent quenching of the associated jets. The energy loss is expected to be smaller for heavy quarks than for light quarks and gluons. It has also been argued that the presence of the medium could modify the parton fragmentation process. Thus, the interaction with the medium can modify jet spectra as well as their properties. Several methods have been developed and used by experiments in high energy particle physics to differentiate jets originating from light and heavy quarks. Most of them exploit the relativly long lifetimes of heavy flavor hadrons, which result in a decay vertex displaced from the beam interaction point. We will give an overview of the of the on-going studies on b-jet tagging in pp collisions in the ALICE experiment at the LHC, and discuss their applicability to Pb-Pb collisions.