|
Title:
|
Chiral approach to antikaon s- and p-wave interactions in dense nuclear matter
|
|
Author:
|
Tolós Rigueiro, Laura; Ramos Gómez, Àngels; Oset Baguena, Eulogio
|
|
Other authors:
|
Universitat de Barcelona |
|
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. |
|
Subject(s):
|
-Propietats de la matèria
-Constitució de la matèria
-Constitució de la matèria
-Col·lisions (Física nuclear)
-Antikaons
-Properties of matter
-Constitution of matter
-Collisions (Nuclear physics)
-Antikaons |
|
Rights:
|
(c) The American Physical Society, 2000
|
|
Document type:
|
Article
Article - Published version |
|
Published by:
|
The American Physical Society
|
|
Share:
|
|
