Darmstadt 2016 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 65: Heavy Ion Collision and QCD Phases XII

HK 65.4: Talk

Friday, March 18, 2016, 15:00–15:15, S1/01 A01

Production of charged pions at SIS 18 energies. — •Malgorzata Gumberidze for the HADES collaboration — TU Darmstadt, Darmstadt, Germany

The High Acceptance DiElectron Spectrometer HADES is devoted mainly to study production of dielectron pairs from proton, pion and nucleus induced reactions at 1-2 AGeV. At the same time, the spectrometer provides detection and high quality identification of chargedhadron with a large solid angle.

In this contribution we present the results of a study of charged pion production at SIS18 energies using the HADES spectrometer at GSI. The main focus is on 40% most central Au(1.23 GeV per nucleon)+Au collisions. The results contribute to the data base from previous systematic studies of pion production with an unprecendented statistics, and serve as an input for the normalization of the dielectron data obtained in the same experiment.

In particular we have performed a measurement of the transverse momentum distributions of pi+ and pi- mesons covering a fairly large rapidity interval. The yields, transverse mass and angular distributions are compared with transport model calculations as well as with existing data from other experiments.

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