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Heidelberg 2015 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 64: Heavy Ion Collisions and QCD Phases 8

HK 64.4: Talk

Thursday, March 26, 2015, 18:30–18:45, T/HS1

Isolated photon measurement with the ALICE EMCAL detector — •Marco Marquard for the ALICE collaboration — Institut für Kernphysik, Goethe Universität Frankfurt am Main, Germany

Isolated photons at high transverse momenta are produced in initial hard scattering processes in high energy p-p and heavy ion collisions. Such processes are thought to scale by the number of binary nucleon-nucleon collisions in heavy ion collisions, hence isolated photons can be used to test scaling properties of particle production in such collisions, furthermore they may give insight to possible modifications of nuclear PDFs. In order to interpret isolated photon spectra in heavy-ion and p-Pb collisions at the LHC, they have to be measured in fundamental p-p collisions.

This talk will focus on the current status of the isolated photon analysis with the ALICE EMCAL. We will discuss technical aspects of the analysis and present methods to define and identify isolated photons. We will show first results of the analysis in p-p collisions.

Supported by BMBF and the Helmholtz Association.

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