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Köln 2004 – scientific programme

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HK: Physik der Hadronen und Kerne

HK 30: Electromagnetic and Hadronic Probes V

HK 30.3: Talk

Wednesday, March 10, 2004, 14:45–15:00, B

Production of Antikaons in p+Au and p+C Collisions* — •Frank Dohrmann — Forschungszentrum Rossendorf

The Kaon Spectrometer experiment KaoS at GSI Darmstadt has performed the first systematic study of the production of antikaons K in p+Au and p+C collisions. Kaons K+ and pions π± have also been measured. The two-fold differential production cross section has been determined at proton beam energies of 1.6, 2.5, 3.5  GeV over a large range in angle 32polar<64 as well as momentum 0.3 GeV/c<p<1.1 GeV/c. The differential cross sections have been compared to transport calculations [1], taking into account the NY production channel for K and an in-medium KN potential. For A+A collisions, data on the production of π± and K± have been interpreted as showing strong medium effects. The p+A presented here are compared with data from p+p and A+A collisions, studying the influence of the nuclear medium on the production of antikaons and kaons.
* supported by BMBF, GSI and FZR

[1] H. W. Barz and L. Naumann, Phys. Rev. C 68 (2003) 041901

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