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HK: Fachverband Physik der Hadronen und Kerne

HK 68: Invited Talks 5

HK 68.2: Hauptvortrag

Freitag, 27. März 2015, 11:40–12:20, T/HS1

Jet Physics with ALICE at the LHC — •Oliver Busch for the ALICE collaboration — University of Tsukuba, Japan — Physialisches Institut, Ruprecht-Karls Universitaet Heidelberg, Germany

Jets are defined in QCD as cascades of consecutive emissions of partons from an initial hard scattering. The process of parton showering and subsequent hadronisation is broadly known as fragmentation. High-energy nucleus-nucleus collisions allow us to probe parton fragmentation within a QCD medium and the properties of this medium via the modification of the jet spectrum and jet structure. Measurements in pp and p-Pb collisions provide an elementary baseline, allow us to investigate perturbative and non-perturbative aspects of particle production and to disentangle final state, potential nuclear initial state, and cold nuclear matter effects.

ALICE at the LHC is a general-purpose heavy ion experiment designed to study the physics of strongly interacting matter and the Quark-Gluon-Plasma, combining excellent charged particle reconstuction and identificitation over a wide momentum range with electromagnetic calorimetry. We present measurements of jet production cross sections, jet structure and jet fragmentation in pp, p-Pb and Pb-Pb collisions. First results on particle identified jet fragmentation will be shown. We will discuss perspectives for LHC run 2 starting in 2015.