The production of ,K±,p has been measured in p+Be and p+Au collisions for comparison with central Si+Au collisions. The inverse slope parameters T0 obtained by an exponential fit to the invariant cross sections in transverse mass are found to be, T0p,K+,140-160 MeV in p+A collisions, whereas in central Si+Au collisions, T0p,K+200-220 MeV 140-160 MeV at midrapidity. The and K+ distributions are shifted backwards in p+Au compared with p+Be. A gradual increase of (dn/dy)K+ per projectile nucleon is observed from p+Be to p+Au to central Si+Au collisions, while pions show no significant increase.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)