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• W2111566170 abstract "We study the properties of $K$ and $overline{K}$ mesons in nuclear matter at finite temperature from a chiral unitary approach in coupled channels that incorporates the $s$ and $p$ waves of the kaon-nucleon interaction. The in-medium solution accounts for Pauli blocking effects, mean-field binding on all the baryons involved, and ensuremath{pi} and kaon self-energies. We calculate $K$ and $overline{K}$ (off-shell) spectral functions and single-particle properties. The $overline{K}$ effective mass gets lowered by about $ensuremath{-}50$ MeV in cold nuclear matter at saturation density and by half this reduction at $T=100$ MeV. The $p$-wave contribution to the $overline{K}$ optical potential, due to $ensuremath{Lambda},ensuremath{Sigma}$, and ${ensuremath{Sigma}}^{*}$ excitations, becomes significant for momenta larger than 200 MeV/$c$ and reduces the attraction felt by the $overline{K}$ in the nuclear medium. The $overline{K}$ spectral function spreads over a wide range of energies, reflecting the melting of the $ensuremath{Lambda}(1405)$ resonance and the contribution of ${mathit{YN}}^{ensuremath{-}1}$ components at finite temperature. In the $mathit{KN}$ sector, we find that the low-density theorem is a good approximation for the $K$ self-energy close to saturation density due to the absence of resonance-hole excitations. The $K$ potential shows a moderate repulsive behavior, whereas the quasiparticle peak is considerably broadened with increasing density and temperature. We discuss the implications for the decay of the $ensuremath{phi}$ meson at GSI Schwerionen Synchrotron energies as well as in the future Facility for Antiproton and Ion Research project." @default.
• W2111566170 created "2016-06-24" @default.
• W2111566170 creator A5002267759 @default.
• W2111566170 creator A5063623096 @default.
• W2111566170 creator A5076989248 @default.
• W2111566170 date "2008-10-17" @default.
• W2111566170 modified "2023-10-01" @default.
• W2111566170 title "Strange mesons in nuclear matter at finite temperature" @default.
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• W2111566170 doi "https://doi.org/10.1103/physrevc.78.045205" @default.
• W2111566170 hasPublicationYear "2008" @default.
• W2111566170 type Work @default.
• W2111566170 sameAs 2111566170 @default.

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