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- W2267130807 abstract "The strangeness $S=-2$ baryon-baryon interaction is studied in chiral effective field theory up to next-to-leading order. The potential at this order consists of contributions from one- and two-pseudoscalar-meson exchange diagrams and from four-baryon contact terms without and with two derivatives. SU(3) flavor symmetry is imposed for constructing the interaction in the $S=-2$ sector. Specifically, the couplings of the pseudoscalar mesons to the baryons are fixed by SU(3) symmetry and, in general, also the contact terms are related via SU(3) symmetry to those determined in a previous study of the $S=-1$ hyperon-nucleon interaction. The explicit SU(3) symmetry breaking due to the physical masses of the pseudoscalar mesons ($pi$, $K$, $eta$) is taken into account. It is argued that the $Xi N$ interaction has to be relatively weak to be in accordance with available experimental constraints. In particular, the published values and upper bounds for the $Xi^- p$ elastic and inelastic cross sections apparently rule out a somewhat stronger attractive $Xi N$ force and, specifically, disfavor any near-threshold deuteron-like bound states in that system." @default.
- W2267130807 created "2016-06-24" @default.
- W2267130807 creator A5014150790 @default.
- W2267130807 creator A5045865390 @default.
- W2267130807 creator A5066567020 @default.
- W2267130807 date "2016-10-01" @default.
- W2267130807 modified "2023-10-07" @default.
- W2267130807 title "Strangeness S = −2 baryon–baryon interaction at next-to-leading order in chiral effective field theory" @default.
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- W2267130807 doi "https://doi.org/10.1016/j.nuclphysa.2016.01.006" @default.
- W2267130807 hasPublicationYear "2016" @default.
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