Münster 2017 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 2: Heavy Ion Collisions and QCD Phases I

HK 2.4: Talk

Monday, March 27, 2017, 17:45–18:00, F 1

What do pions tell us about dynamics of heavy-ion collisions at SIS18 energies ? — •Malgorzata Gumberidze for the HADES collaboration — TU Darmsatdt, Germany

Pion production is the dominating inelastic process in nucleus-nucleus collisions. The production of pions in the SIS18 energy range (1-2 GeV per nucleon) proceeds primarily through the excitation and decay of baryonic resonances. In a baryon rich environment, therefore, pions serve as important messengers of the reaction dynamics.

In this contribution we present results of a study of charged pion production at SIS18 energies using the HADES spectrometer at GSI. The main focus will be on 40% most central Au(1.23 GeV per nucleon)+Au collisions. Our results contribute with an unprecedented statistics to systematic studies of pion production in heavy-ion collisions.

We have preformed a measurement of the transverse momentum distributions of π^± mesons covering a fairly large rapidity interval. The yields, transverse mass, angular distributions and azimuthal emission patterns are compared with transport model calculations as well as wtih existing data from other experiments.

This work has been supported by VH-NG-823, Helmholtz Alliance HA216/EMMI, GSI.