Münster 2011 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 22: Schwerionenkollisionen und QCD Phasen IV
HK 22.4: Vortrag
Dienstag, 22. März 2011, 17:30–17:45, HS AP
Jet and High-pT Measurments with the ALICE Experiment at the LHC — •Bastian Bathen1, Tom Dietel1, and Christian Klein-Bösing1,2 — 1Institut für Kernphysik, WWU Münster — 2ExtreMe Matter Institute, GSI Darmstadt
Jet and high-pT measurements provide a detailed insight of the strongly interacting matter, called Quark-Gluon Plasma (QGP), which is expected to be produced in heavy-ion collisions. Jets, as a spray of high-pT particles, are produced from the fragmentation of hard scattered partons and can be used as a hard probe of the QGP formed in later stages of a heavy-ion collision. Before looking into heavy-ion collissions we study proton-proton collisions where the partons evolve in a QCD-vacuum. These measurements are essential in order to understand the jet production and detector response to jets in a clean environment.
With the first year data-taking of the ALICE experiment at the LHC (CERN) in 2010 we studied p+p collisions and Pb+Pb collision at the highest energy ever provided by any collider. We present results from the first period of p+p collisions up to √s = 7 TeV and show first studies of Pb+Pb collisions at √sNN = 2.76 TeV. These include raw jet-production rates and a more specifically momentum distributions of tracks within jets and the single track correlation to jets which is sensitive to medium effects of the QGP.