Abstract
Inclusive doubly differential cross sections d 2 σ pA /dx F dp 2 T as a function of Feynman-x (x F ) and transverse momentum (p T ) for the production of K 0 S , Λ and \(\bar{\varLambda}\) in proton-nucleus interactions at 920 GeV are presented. The measurements were performed by HERA-B in the negative x F range (−0.12<x F <0.0) and for transverse momenta up to p T =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 V 0 species. The atomic number dependence is parameterized as σ pA =σ pN ⋅A α where σ pN 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.
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An erratum to this article can be found at http://dx.doi.org/10.1140/epjc/s10052-009-1138-4
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The HERA-B Collaboration., Abt, I., Adams, M. et al. V0 production in p+A collisions at \(\sqrt{s}=41.6\) GeV. Eur. Phys. J. C 61, 207–221 (2009). https://doi.org/10.1140/epjc/s10052-009-1005-3
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DOI: https://doi.org/10.1140/epjc/s10052-009-1005-3