Strangeness S = -2 baryon-baryon interactions using chiral effective field theory

Polinder, H.; Haidenbauer, J.; Meissner, U.G.

doi:10.1016/j.physletb.2007.07.045

Journal Article

PreJuSER-60465

Strangeness S = -2 baryon-baryon interactions using chiral effective field theory

Polinder, H.FZJ* ; Haidenbauer, J.FZJ* ; Meissner, U. G.FZJ*

2007
North-Holland Publ. Amsterdam

Physics letters / B 653, 29 - 37 (2007) [10.1016/j.physletb.2007.07.045]

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Please use a persistent id in citations: http://hdl.handle.net/2128/10512 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)(f) 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. (c) 2007 Elsevier B.V. All rights reserved.

Keyword(s): hyperon hyperon: interaction ; nucleon hyperon: interaction ; effective field theory ; effective Lagrangian: chiral ; effective potential ; strangeness: -2 ; symmetry: SU(3) ; baryon: four-fermion interaction ; partial wave ; pseudoscalar meson: exchange ; isospin ; channel cross section: momentum dependence ; scattering length ; numerical calculations ; hyperon-hyperon interaction (auto) ; hyperon-nucleon interaction (auto) ; effective field theory (auto) ; chiral lagrangian (auto)