Köln 2004 – wissenschaftliches Programm
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HK: Physik der Hadronen und Kerne
HK 30: Electromagnetic and Hadronic Probes V
HK 30.3: Vortrag
Mittwoch, 10. März 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
32∘<θpolar<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 K−N
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