Antikaon Production in Proton-Nucleus Reactions and the $K^{-}$ properties in nuclear matter

Abstract

We calculate the momentum-dependent potentials for $K^{+}$ and $K^{-}$ mesons in a dispersion approach at nuclear density ${\rho }_0$ using the information from the vacuum $K^{+}N$ and $K^{-}N$ scattering amplitudes, however, leaving out the resonance contributions for the in-medium analysis. Whereas the $K^{+}$ potential is found to be repulsive ($\approx$ + 30 MeV) and to show only a moderate momentum dependence, the $K^{-}$ selfenergy at normal nuclear matter density turns out to be $\approx$ - 200 MeV at zero momentum in line with kaon atomic data, however, decreases rapidly in magnitude for higher momenta. The antikaon production in p + A reactions is calculated within a coupled transport approach and compared to the data at KEK including different assumptions for the antikaon potentials. Furthermore, detailed predictions are made for $p{+}^{12}C$ and $p{+}^{207}Pb$ reactions at 2.5 GeV in order to determine the momentum dependent antikaon potential experimentally.

27 pages, LaTeX, including 14 ps-figures, UGI-98-18

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• Kaons in dense matter, kaon production in heavy-ion collisions, and kaon condensation in neutron stars
• Nuclear kaon dynamics
• In-medium kaon and antikaon properties in the quark-meson coupling model
• Real time description of fission
• Meson $m_T$-scaling in heavy-ion collisions at SIS energies
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• Partial wave contributions to the antikaon potential at finite momentum
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• The antikaon nuclear potential in hot and dense matter
• Open charm production in relativistic nucleus-nucleus collisions
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• Effects of hadronic potentials on elliptic flows in relativistic heavy ion collisions
• First observation of in-medium effects on phase space distributions of antikaons measured in proton-nucleus collisions
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• Evidence of kaon nuclear and Coulomb potential effects on soft K+ production from nuclei
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• Contribution of the nucleon-hyperon reaction channels to K${}^{-}$ production in proton-nucleus collisions
• Transport analysis of K+ production in proton-nucleus reactions
• Kaonic modes in hyperonic matter and p-wave kaon condensation
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• Charged kaon production by coherent scattering of neutrinos and antineutrinos on nuclei
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• Subthreshold and near-threshold kaon and antikaon production in proton-nucleus reactions
• Kaon-Deuteron Scattering at Low Energies
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• Kaon pair production in proton-nucleus collisions at 2.83 GeV kinetic energy
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• Directed flow of neutral strange particles at AGS
• Medium effects in antikaon-induced ${\Xi }^{-}$ hyperon production on nuclei near threshold
• New method of studying slow strange meson properties in nuclear matter
• Low energy kaon photoproduction from nuclei
• Transport analysis of in-medium hadron effects in pA and AA collisions