Strangeness S=-2 baryon-baryon interactions using chiral effective field theory
arXiv:0705.3753 · doi:10.1016/j.physletb.2007.07.045
Abstract
We derive the leading order strangeness S=-2 baryon-baryon interactions in chiral effective field theory. The potential consists of contact terms without derivatives and of one-pseudoscalar-meson exchanges. The contact terms and the couplings of the pseudoscalar mesons to the baryons are related via SU(3) flavor symmetry to the S=-1 hyperon-nucleon channels. We show that the chiral effective field theory predictions with natural values for the low-energy constants agree with the experimental information in the S=-2 sector.
10 pages, 2 PostScript figures