2015/04/10 by M. M. Nagels, Nagels, M. M., Th. A. Rijken +3 · 2 citations
Physics and Astronomy · #FOS: Physical sciences #High-Energy Particle Collisions Research #Nuclear Theory (nucl-th) #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #nucl-th
paper · pdf · doi:10.48550/arxiv.1504.02634
arXiv admin note: substantial text overlap with arXiv:nucl-th/0608074
arxiv created 2015/04/10 · openalex publication_date 2015/04/10 · arxiv updated 2015/04/13 · openalex created_date 2022/10/03 · openalex updated_date 2026/07/28
This paper presents the Extended-Soft-Core (ESC) potentials ESC08c for baryon-baryon channels with total strangeness S=-2. The potential models for S=-2 are based on SU(3) extensions of ESC potential models for the S=0 and S=-1 sectors, which are fitted to experimental data. Flavor SU(3)-symmetry is broken only kinematically by the masses of the baryons and the mesons. For the S=-2 channels no experimental scattering data exist, and also the information from hypernuclei is rather limited. Nevertheless, in the fit to the S=0 and S=-1 sectors information from the so called NAGARA event and the Ξ-well-depth has been used as constraints to determine the free parameters in the simultaneous fit of the NN ⊕ YN ⊕ YY data. Therefore, the potentials for the S=-2 sector are determined mainly by the NN-, YN-data, and SU(3)-symmetry.Various properties of the potentials are illustrated by giving results for scattering lengths, effective ranges, bound states, elastic and inelastic phase parameters, and total cross sections. Notably is the prediction of a bound state D^* in the ΞN(3S1,I=1)-channel with a binding energy BE=1.56 MeV. This state is deuteron-like, i.e. a member of the \10^*\-decuplet. As for the normal deuteron D= pn(3S1-3D1) the strong tensor force is responsible for this state. The features of Ξ hypernuclei predicted by ESC08c are studied on the basis of the G-matrix approch. The well-depth UΞ= -7.0 MeV, and the Ξ-ΛΛ conversion width is ΓΞc= 4.5 MeV.