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HK: Fachverband Physik der Hadronen und Kerne

HK 9: Heavy Ion Collisions and QCD Phases II

HK 9.5: Vortrag

Montag, 26. Februar 2018, 17:45–18:00, HZO 60

Recent event-by-event net-particle fluctuation results from ALICE — •Mesut Arslandok for the ALICE collaboration — Physikalisches Institut Heidelberg

The fluctuations of conserved charges - such as electric charge, strangeness, or baryon number - in ultrarelativistic heavy-ion collisions provide insights into the properties of hot and dense matter produced as well as the QCD phase diagram. They can be related to the moments of the multiplicity distributions of identified particles. In this context, experimental results will be presented on event-by-event analysis of net baryon fluctuation measurements in Pb–Pb collisions recorded by the ALICE Collaboration at the CERN LHC. In addition to net-protons, used as a proxy for net-baryons, similar results for net-pions and net-kaons will be presented. Contributions from participant fluctuations and resonances as well as baryon number conservation will be discussed. Particular emphasis will be placed on the quantitative understanding of the centrality and rapidity width dependence of the obtained results. The data will be compared with recent predictions from the Hadron Resonance Gas model (HRG) and Lattice QCD (LQCD).

Supported by BMBF and SFB 1225 ISOQUANT.