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Title: Baryon decuplet in the chiral dynamics of {lambda} hyperons in nuclear matter

Abstract

We study the long range part of the {lambda}-hyperon optical potential in nuclei using quantum many body techniques and flavor-SU(3) chiral Lagrangians as starting point. More precisely, we study the contributions to the {lambda}-hyperon optical potential due to the long-range two-pion exchange, with {sigma} and {sigma}* baryons in the internal baryonic lines and considering Nh and {delta}h excitations. We also consider the contribution to the spin-orbit potentials that comes out from these terms. Our results support a natural explanation of the smallness of the {lambda}-nuclear spin-orbit interaction and show the importance of the {sigma}* and {delta} degrees of freedom for the hyperon-nucleus interactions.

Authors:
;  [1]
  1. Departamento de Fisica Teorica and IFIC, Centro Mixto Universidad de Valencia CSIC, Institutos de Investigacion de Paterna, Aptdo. 22085, E-46071 Valencia (Spain)
Publication Date:
OSTI Identifier:
20995166
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. C, Nuclear Physics; Journal Volume: 75; Journal Issue: 3; Other Information: DOI: 10.1103/PhysRevC.75.035207; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; CHIRALITY; DEGREES OF FREEDOM; EXCITATION; FLAVOR; L-S COUPLING; LAGRANGIAN FUNCTION; MANY-BODY PROBLEM; NUCLEAR MATTER; NUCLEI; NUCLEON-HYPERON INTERACTIONS; PIONS; POTENTIALS; SIGMA MINUS PARTICLES; SPIN

Citation Formats

Camalich, J. Martin, and Vacas, M. J. Vicente. Baryon decuplet in the chiral dynamics of {lambda} hyperons in nuclear matter. United States: N. p., 2007. Web. doi:10.1103/PHYSREVC.75.035207.
Camalich, J. Martin, & Vacas, M. J. Vicente. Baryon decuplet in the chiral dynamics of {lambda} hyperons in nuclear matter. United States. doi:10.1103/PHYSREVC.75.035207.
Camalich, J. Martin, and Vacas, M. J. Vicente. Thu . "Baryon decuplet in the chiral dynamics of {lambda} hyperons in nuclear matter". United States. doi:10.1103/PHYSREVC.75.035207.
@article{osti_20995166,
title = {Baryon decuplet in the chiral dynamics of {lambda} hyperons in nuclear matter},
author = {Camalich, J. Martin and Vacas, M. J. Vicente},
abstractNote = {We study the long range part of the {lambda}-hyperon optical potential in nuclei using quantum many body techniques and flavor-SU(3) chiral Lagrangians as starting point. More precisely, we study the contributions to the {lambda}-hyperon optical potential due to the long-range two-pion exchange, with {sigma} and {sigma}* baryons in the internal baryonic lines and considering Nh and {delta}h excitations. We also consider the contribution to the spin-orbit potentials that comes out from these terms. Our results support a natural explanation of the smallness of the {lambda}-nuclear spin-orbit interaction and show the importance of the {sigma}* and {delta} degrees of freedom for the hyperon-nucleus interactions.},
doi = {10.1103/PHYSREVC.75.035207},
journal = {Physical Review. C, Nuclear Physics},
number = 3,
volume = 75,
place = {United States},
year = {Thu Mar 15 00:00:00 EDT 2007},
month = {Thu Mar 15 00:00:00 EDT 2007}
}