V0 production in p+A collisions at √(s) = 41.6 GeV

Inclusive doubly differential cross sections d2σpA/dxFdp2T as a function of Feynman-x (xF) and transverse momentum (pT) for the production of K0S, Λ and anti Λ in proton-nucleus interactions at 920GeV are presented. The measurements were performed by HERA-B in the negative xF range (-0.12<xF<0.0) and for transverse momenta up to pT=1.6 GeV/c. Results for three target materials: carbon, titanium and tungsten are given. The ratios of production cross sections are presented and discussed. The Cronin effect is clearly observed for all three V0 species. The atomic number dependence is parameterized as σpA=σpN . Aα where σpN is the proton-nucleon cross section. The measured values of α are all near one. The results are compared with EPOS 1.67 and PYTHIA 6.3. EPOS reproduces the data to within ∼20% except at very low transverse momentum. (orig.)