Darmstadt 2016 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 56: Heavy Ion Collision and QCD Phases XI

HK 56.2: Vortrag

Donnerstag, 17. März 2016, 16:45–17:00, S1/01 A01

Measurement of isolated photons with ALICE — •Marco Marquard — Institut für Kernphysik, Goethe Universität Frankfurt am Main

Isolated photons at high transverse momenta are produced in initial hard-scattering processes in high-energy pp 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 pp collisions.

After an introduction of the analysis technique, the status of the isolated photon measurement in pp collisions with the ALICE EMCAL will be presented. The cross section of isolated photons, necessary corrections and systematic studies will be discussed.

Supported by BMBF and the Helmholtz Association