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The in-medium $\bar K N$ interaction within a chiral unitary approach

Laura Tolos·Angels Ramos·Eulogio Oset
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Abstract

The s- and p-wave contributions to the $\bar K N$ interaction in dense nuclear matter are obtained using a chiral unitary approach. We perform a self-consistent calculation of the $\bar K$ self-energy including Pauli blocking effects, meson self-energies modified by short-range correlations and baryon binding potentials. We find that the on-shell factorization cannot be applied to evaluate the in-medium corrections to p-wave amplitudes. Furthermore, the $Λ$ and $Σ$ develop a mass shift of -30 MeV at saturation density while the $Σ^*$ width increases to 80 MeV. We conclude that no deep and narrow $\bar K$ bound states could be observed.

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Laura Tolos, Angels Ramos, Eulogio Oset. 2007-02-28. The in-medium $\bar K N$ interaction within a chiral unitary approach. https://doi.org/10.1143/ptps.168.635

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