Strangeness S=−2 baryon–baryon interactions using chiral effective field theory

• DOI: 10.1016/j.physletb.2007.07.045
• Publication Date: 2007-08-01T12:57:35Z
• Authors: H. Polinder; J. Haidenbauer; U.-G. Meißner
• Keywords: Pseudoscalar meson

10 pages, 2 PostScript figures<br/>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.<br/>