Hyperon-nucleon interactions in effective field theory

Details Hyperon-nucleon interactions in effective field theory Hyperon-nucleon interactions in effective field theory

2006-12-11

arxiv.org/abs/nucl-th/0612042v1

Physics

Nuclear Physics

Nuclear Theory

6 pages, 6 PostScript figures, invited talk to appear in the proceedings of the "IX International Conference on Hypernuclear a

Scientific paper

We have constructed the leading order hyperon-nucleon potential in a chiral Effective Field Theory approach. The chiral potential consists of one-pseudoscalar-meson exchanges and non-derivative four-baryon contact terms. The hyperon-nucleon interactions are derived using SU(3) symmetry, the nucleon-nucleon interaction is not considered explicitly since it can not be described well with a leading order chiral Effective Field Theory. We solve a regularized Lippmann-Schwinger equation and show that a good description of the available hyperon-nucleon scattering data is possible with five free parameters. The chiral potential can be used as further input for hypernucleus and hypernuclear matter calculations. Preliminary hypertriton calculations yielded the correct hypertriton binding energy.

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