Résumé
Inclusive doubly differential cross sections d 2 σ pA /dx F ∈ dp T 2 as a function of Feynman-x (x F ) and transverse momentum (p T ) for the production of K S 0 , Λ and Λ 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.
| langue originale | Anglais |
|---|---|
| Pages (de - à) | 207-221 |
| Nombre de pages | 15 |
| journal | European Physical Journal C |
| Volume | 61 |
| Numéro de publication | 2 |
| Les DOIs | |
| état | Publié - 1 janv. 2009 |
| Modification externe | Oui |
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