Münster 2011 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 22: Schwerionenkollisionen und QCD Phasen IV
HK 22.7: Vortrag
Dienstag, 22. März 2011, 18:15–18:30, HS AP
Charged Particle Momentum Distribution in Jets in ALICE — Bastian Bathen1, •Oliver Busch2, and Christian Klein-Bösing1,3 — 1Institut fuer Kernphysik, Westfälische Willhelms-Universität Münster — 2Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg — 3ExtreMe Matter Institut EMMI, GSI Helmholtzzentrum fuer Schwerionenforschung, Darmstadt
Jets are defined in QCD as cascades of consecutive emission of partons from an initial hard scattering. The process of parton showering and subsequent hadronisation is broadly known as fragmentation. They can be studied via the momentum distribution of hadrons in jets. High energy nucleus-nucleus collisions allow us to study parton fragmentation within a QCD medium, and the properties of this medium via the modification of the jet structure.
The ALICE experiment at CERN LHC is a general-purpose heavy ion experiment designed to study the physics of stronlgy interacting matter and the Quark-Gluon-Plasma, with excellent charged particle reconstuction and identification capabilities over a wide momentum range. We present measurements of fragmentation functions for jets reconstructed from charged particles in the ALICE central barrel. First results for proton-proton collisions are discussed and the status of the corresponding analysis for heavy ion collisions is presented. We give an outlook on identified particle fragmentation functions.