PS05 Hadronic Physics
Baryon number transfer and baryon pair production in soft hadronic interactions at the CERN SPS
Eötvös Loránd University, Budapest, Hungary
Accepted: 9 January 2004
Published online: 17 February 2004
Results on proton and neutron production in p+p interactions at 158 GeV beam energy are presented. The distribution of net baryon density, in particular concerning the feed-over between target and projectile hemispheres, is determined from π ± + p and p + p interactions, invoking the non-baryonic nature of pion projectile. For p+p collisions, net baryon density is studied in association with a final state proton. It is demonstrated that net baryon production is described by a factorizing two-component mechanism. The maximum range of baryon number transfer is limited to about 4.5 units of rapidity. Using a comparison of anti-proton production in p+p and n+p interactions it is shown that baryon pair production depends on the valence structure of the incoming hadrons and is characterized by strong charge-asymmetric contributions of the type and in addition to the symmetric terms and .
PACS: 13.85.Ni Baryon production in hadronic interactions
© Società Italiana di Fisica, Springer-Verlag, 2004