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arXiv · 0812.0471

V^0 production in p+A collisions at \sqrt{s} = 41.6 GeV

B Collaboration
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Abstract

Inclusive doubly differential cross sections d^2σ_{pA}/dx_Fdp_T^2 as a function of Feynman-x (x_F) and transverse momentum (p_T) for the production of K^0_s, Lambda^0 and anti-Lambda^0 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} \cdot A^αwhere σ_{pN} is the proton-nucleon cross section. The measured values of αare all near one. The results are compared with EPOS 1.67 and PYTHIA 6.3. EPOS reproduces the data to within \approx 20% except at very low transverse momentum.

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B Collaboration. 2009-03-16. V^0 production in p+A collisions at \sqrt{s} = 41.6 GeV. https://doi.org/10.1140/epjc/s10052-009-1005-3 10.1140/epjc/s10052-009-1138-4

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