dorsal/arxiv
View SchemaAntikaon Production in Proton-Nucleus Reactions and the $K^-$ properties in nuclear matter
| Authors | A. Sibirtsev, W. Cassing |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9805021 |
| URL | https://arxiv.org/abs/nucl-th/9805021 |
| DOI | 10.1016/S0375-9474(98)00536-3 |
| Journal | Nucl.Phys. A641 (1998) 476-498 |
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.
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"abstract": "We calculate the momentum-dependent potentials for $K^+$ and $K^-$ mesons in\na dispersion approach at nuclear density $\\rho_0$ using the information from\nthe vacuum $K^+ N$ and $K^- N$ scattering amplitudes, however, leaving out the\nresonance contributions for the in-medium analysis. Whereas the $K^+$ potential\nis found to be repulsive ($\\approx$ + 30 MeV) and to show only a moderate\nmomentum dependence, the $K^-$ selfenergy at normal nuclear matter density\nturns out to be $\\approx$ - 200 MeV at zero momentum in line with kaon atomic\ndata, however, decreases rapidly in magnitude for higher momenta. The antikaon\nproduction in p + A reactions is calculated within a coupled transport approach\nand compared to the data at KEK including different assumptions for the\nantikaon potentials. Furthermore, detailed predictions are made for $p +\n^{12}C$ and $p + ^{207}Pb$ reactions at 2.5 GeV in order to determine the\nmomentum dependent antikaon potential experimentally.",
"arxiv_id": "nucl-th/9805021",
"authors": [
"A. Sibirtsev",
"W. Cassing"
],
"categories": [
"nucl-th"
],
"doi": "10.1016/S0375-9474(98)00536-3",
"journal_ref": "Nucl.Phys. A641 (1998) 476-498",
"title": "Antikaon Production in Proton-Nucleus Reactions and the $K^-$ properties in nuclear matter",
"url": "https://arxiv.org/abs/nucl-th/9805021"
},
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