Bonn 2010 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 23: Schwerionenkollisionen und QCD Phasen III

HK 23.8: Vortrag

Dienstag, 16. März 2010, 18:30–18:45, HG I

Two-Particle Jet-Like Correlations in the ALICE Experiment at the LHC — •Jason Glyndwr Ulery — Institut für Kernphysik - Goethe-Universität, Frankfurt, Germany

The Large Hadron Collider will be able to collide protons at energies up to √s=14 TeV and lead ions at energies up to √sNN=5.5 TeV. One way to study these collisions is through jet-like correlations. In pp collisions, these correlations provide information about the fragmentation of a high momentum parton into a jet of hadrons. This can be compared to calculations and event simulators, such as PYTHIA and PHOJET, because high momentum partons are calculable in perturbative Quantum Chromodynamics and can be fragmented according to models, such as the Lund String Model. One may also study whether the assumed underlying event, likely composed of particles from non-perturbative soft processes, is truly uncorrelated from the jet. In heavy-ion collisions, the jet is used as a probe of the medium created in these collisions. The medium is expected be a Quark-Gluon Plasma, a deconfined state of quarks in gluons. With measurements in pp collisions and calculations/simulations, jets are a well calibrated probe. These correlations can be used to study how energy is lost in the medium and the interactions of the medium and the jet. I will present the status of an analysis of 2-particle jet-like correlations of charged particles measured in the ALICE Time Projection Chamber and discuss the physics results that can be obtained from this analysis.

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