Heidelberg 2015 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 48: Poster
HK 48.25: Poster
Mittwoch, 25. März 2015, 17:00–19:00, C/Foyer
Measurement of Neutral Pions with the ALICE PHOS in pp-collisions at √s = 8 TeV — •Svenja Pflitsch — Institut für Kernphysik, Goethe-Universität Frankfurt
The ALICE-experiment at the LHC is dedicated to study the properties of the Quark-Gluon-Plasma by means of heavy-ion-collisions. Hadronic spectra in pp-collisions at the same energy establish a vital baseline for the understanding of hadron-production. In this context the measurement of neutral pions via the two-photon decay channel provides a complementary analysis to the measurement of charged pions.
The PHOS is one of the two electromagnetic calorimeters of ALICE, consisting of PbWO4 crystals. The reconstruction method of the decay-photons and the large signal-to-background ratio in pp collisions lead to a high statistics measurement across a large pT range.
We present the status of the analysis of neutral pions based on LHC Run 1 data at √s = 8 TeV. Details of the analysis such as peak extraction and the resulting spectra are discussed. This includes acceptance and reconstruction efficiencies derived from Monte-Carlo simulations as well as a comparison with an independent parallel analysis.
Supported by BMBF and the Helmholtz Association.