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Phenomenological analysis of K+ meson production in proton-nucleus collisions | M. Buescher
; B.L. Ioffe
; V. Koptev
; M. Nekipelov
; A. Sibirtsev
; K. Sistemich
; J. Speth
; H. Stroeher
; | Date: |
16 Jul 2001 | Journal: | Phys.Rev. C65 (2002) 014603 | Subject: | nucl-ex | Abstract: | 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. | Source: | arXiv, nucl-ex/0107011 | Services: | Forum | Review | PDF | Favorites |
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