Frankfurt 2014 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 60: Hadronenstruktur und -spektroskopie

HK 60.1: Group Report

Friday, March 21, 2014, 14:00–14:30, HZ 3

Behaviour of kaons in cold nuclear matter — •Kirill Lapidus for the HADES collaboration — Excellence Cluster ’Universe’, Boltzmannstr. 2, 85748, Garching, Germany

A number of experimental and theoretical efforts were made to understand the behaviour of hadrons immersed in a strongly interacting environment. This contribution addresses the case of K⁰-mesons produced in proton-niobium collisions. The high-statistics (∼ 10⁴ kaons) data were delivered by the HADES experiment (GSI Helmholtzzentrum), employing a proton beam with a kinetic energy of 3.5 GeV. The GiBUU transport model was used for the interpretation of the data. The model allows to simulate the production and propagation of kaons inside the nucleus, including their interaction with the collective of nucleons in terms of a mean field potential. The data favour the presence of the repulsive kaon potential that follows from the Chiral Perturbation Theory.

Supported by BMBF and the Excellence Cluster “Universe”.