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Title: Chiral approach to antikaon s- and p-wave interactions in dense nuclear matter
Author: Tolós Rigueiro, Laura
Ramos Gómez, Àngels
Oset Baguena, Eulogio
Keywords: Propietats de la matèria
Constitució de la matèria
Constitució de la matèria
Col·lisions (Física nuclear)
Properties of matter
Constitution of matter
Collisions (Nuclear physics)
Issue Date: 2006
Publisher: The American Physical Society
Abstract: The properties of the antikaons in nuclear matter are investigated from a chiral unitary approach which incorporates the s- and p-waves of the ${\bar K}N$ interaction. To obtain the in-medium meson-baryon amplitudes we include, in a self-consistent way, Pauli blocking effects, meson self-energies corrected by nuclear short-range correlations and baryon binding potentials. We pay special attention to investigating the validity of the on-shell factorization, showing that it cannot be applied in the evaluation of the in-medium corrections to the p-wave amplitudes. In nuclear matter at saturation energy, the $\Lambda$ and $\Sigma$ develop an attractive potential of about -30 MeV, while the $\Sigma^*$ pole remains at the free space value although its width gets sensibly increased to about 80 MeV. The antikaon also develops a moderate attraction that does not support the existence of very deep and narrow bound states, confirming the findings of previous self-consistent calculations.
Note: Reproducció digital del document publicat en format paper, proporcionada per PROLA i
It is part of: Physical Review C, 2006, vol. 74, núm. 1, p. 015203-1-015203-14
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ISSN: 0556-2813
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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