Bochum 2018 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 31: Heavy Ion Collisions and QCD Phases V

HK 31.4: Vortrag

Mittwoch, 28. Februar 2018, 15:00–15:15, HZO 60

Measurement of Neutral Pions in pp Collisions at √s= 5.02 TeV with the ALICE DCal — •Adrian Mechler for the ALICE collaboration — Institut für Kernphysik, Goethe-Universität Frankfurt

The ALICE experiment at the CERN LHC investigates the properties of the quark-gluon plasma (QGP) which is believed to be produced in Pb–Pb collisions at high collision energies. Hadron production measurements in pp collisions provide information about the underlying QCD processes and fragmentation functions. Furthermore, pp results provide an important baseline for heavy-ion collisions.

The talk focuses on a measurement of neutral pions (π⁰) which are reconstructed via their two-photon decay. The ALICE calorimeters are used to measure the position and energy of the decay photons. To enlarge the acceptance coverage of the calorimeters in ALICE with respect to LHC-RUN1 the di-jet Calorimeter (DCal) has been added for the current RUN2 data taking.

We will present the status of the first analysis of the π⁰ production in pp collisions at √s=5.02 TeV, measured with the DCal. Main analysis steps such as the extraction and various corrections of the π⁰ yield will be discussed. Supported by BMBF and the Helmholtz Association.