Hyperon-nucleon interactions in effective field theory
摘要
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.
关键词
引用
@article{arxiv.nucl-th/0612042,
title = {Hyperon-nucleon interactions in effective field theory},
author = {H. Polinder},
journal= {arXiv preprint arXiv:nucl-th/0612042},
year = {2007}
}
备注
6 pages, 6 PostScript figures, invited talk to appear in the proceedings of the "IX International Conference on Hypernuclear and Strange Particle Physics"