2006/12/01 by Jorge Martin Camalich, J. Martín Cámalich, Cámalich, J. Martín
Physics and Astronomy · #High-Energy Particle Collisions Research #Quantum Chromodynamics and Particle Interactions #Quantum, superfluid, helium dynamics #nucl-th
paper · pdf · doi:10.48550/arxiv.nucl-th/0612001
Talk given at HYP 2006 (Mainz, Germany), 10-14 October 2006; 4 pages, 4 figures
arxiv created 2006/12/01 · arxiv updated 2009/12/01
We extend a chiral effective field theory approach to the Λ-nuclei interaction with the inclusion of the decuplet baryons. More precisely, we study the contributions due to the long-range two-pion exchange, with Σ and Σ^* baryons in the internal baryonic lines considering Nh and Δh excitations. In particular, central and spin-orbit potentials are studied. For the former, regularization is needed and physical values of the cut-off give a large attraction, becoming necessary to include the repulsion of other terms not considered here. For the latter, in a model-independent framework, the inclusion of the decuplet supports the natural explanation of the smallness of the Λ-nuclear spin-orbit term and shows the importance of the Σ^* and Δ degrees of freedom for the hyperon-nucleus interactions.