Subthreshold and near-threshold kaon and antikaon production in proton-nucleus reactions

Abstract

The differential production cross sections of K^+ and K^- mesons have been measured at the ITEP proton synchrotron in p+Be, p+Cu collisions under lab angle of 10.5^0, respectively, at 1.7 and 2.25, 2.4 GeV beam energies. A detailed comparison of these data with the results of calculations within an appropriate folding model for incoherent primary proton-nucleon, secondary pion-nucleon kaon and antikaon production processes and processes associated with the creation of antikaons via the decay of intermediate phi mesons is given. We show that the strangeness exchange process YN->NNK^- gives a small contribution to the antikaon yield in the kinematics of the performed experiment. We argue that in the case when antikaon production processes are dominated by the channels with KK^- in the final state, the cross sections of the corresponding reactions are weakly influenced by the in-medium kaon and antikaon mean fields.

24 pages. accepted for publication at J.Phys.G

References in corpus (11)

• First observation of in-medium effects on phase space distributions of antikaons measured in proton-nucleus collisions
• Kaon Pair Production in Proton--Proton Collisions
• Antikaons and hyperons in nuclear matter with saturation
• Precision measurement of the quasi-free pn->dphi reaction close to threshold
• Combined Analysis of Near-Threshold Production of omega and phi Mesons in Nucleon-Nucleon Collisions within an Effective Meson-Nucleon Model
• Inclusive K^+ meson production in proton-nucleus interactions
• Measurement of the pn -> dK^+K^- total cross section close to threshold
• Contribution of the nucleon-hyperon reaction channels to K${}^{-}$ production in proton-nucleus collisions
• Transport analysis of K+ production in proton-nucleus reactions
• Interpretation of K+K0bar pair production in pp collisions
• Absorption of phi mesons in near-threshold proton-nucleus reactions

Cited by in corpus (5)

• Meson-nucleus potentials and the search for meson-nucleus bound states
• Momentum dependence of pion-induced $\varphi$ meson production on nuclei near threshold
• Testing the $\varphi$-nuclear potential in pion-induced $\varphi$ meson production on nuclei near threshold
• Medium effects in $\Lambda K^{+}$ pair production by 2.83 GeV protons on nuclei
• Kaon pair production in proton-nucleus collisions at 2.83 GeV kinetic energy