Phenomenological analysis of K+ meson production in proton-nucleus collisions
| Autor: | Markus Büscher, Ioffe, B. L., Koptev, V., Nekipelov, M., Sibirtsev, A., Sistemich, K., Speth, J., Ströher, H. |
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| Jazyk: | angličtina |
| Rok vydání: | 2001 |
| Předmět: |
channel cross section
energy spectrum [K+] scaling FOS: Physical sciences hadroproduction [K+] mass number [dependence] interpretation of experiments [numerical calculations] nuclear reaction [p nucleus] ddc:530 0.8-2.9 GeV High Energy Physics::Experiment momentum transfer [differential cross section] Nuclear Experiment (nucl-ex) Nuclear Experiment |
| Zdroj: | Physical review / C 65(1), 014603 (2001). doi:10.1103/PhysRevC.65.014603 Scopus-Elsevier |
| DOI: | 10.1103/PhysRevC.65.014603 |
| Popis: | Total and differential cross sections from literature, on the production of K+ mesons in pA interactions at projectile energies between T=0.8 and 2.9 GeV, covering the transition across the free nucleon-nucleon threshold at 1.58 GeV, have been investigated. From the target-mass dependence of the production cross sections no evidence for the expected change of the dominant reaction mechanism from two-step to direct kaon production was found. At T=1.0 GeV the A dependences of the total cross sections and of the most recent data from COSY-Juelich, differential cross sections measured under forward angles, are strongly different. The invariant K+ production cross sections show an overall exponential scaling behavior with the squared four-momentum transfer between the beam proton and the produced K+ meson for t< -0.05 GeV^2 independent of the beam energy and emission angle. The data from COSY-Juelich reveal a strongly different t dependence in the region of t>0 GeV^2. Further data at forward angles and different beam energies should be taken in order to explore this region of kinematically extreme conditions. 9 Pages, 11 Figures |
| Databáze: | OpenAIRE |
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