Baryon decuplet in the chiral dynamics of {lambda} hyperons in nuclear matter
- Departamento de Fisica Teorica and IFIC, Centro Mixto Universidad de Valencia CSIC, Institutos de Investigacion de Paterna, Aptdo. 22085, E-46071 Valencia (Spain)
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.
- OSTI ID:
- 20995166
- Journal Information:
- Physical Review. C, Nuclear Physics, Vol. 75, Issue 3; Other Information: DOI: 10.1103/PhysRevC.75.035207; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
- Country of Publication:
- United States
- Language:
- English
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