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arXiv · 1304.5339

Hyperon-nucleon interaction at next-to-leading order in chiral effective field theory

J. Haidenbauer·S. Petschauer·N. Kaiser·U. -G. Meißner·A. Nogga·W. Weise
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Abstract

Results for the Lambda N and Sigma N interactions obtained at next-to-leading order in chiral effective field theory are reported. At the order considered there are 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 hyperon-nucleon interaction while the explicit SU(3) symmetry breaking by the physical masses of the pseudoscalar mesons (pi, K, eta) is taken into account. An excellent description of the hyperon-nucleon system can be achieved at next-to-leading order. It is on the same level of quality as the one obtained by the most advanced phenomenological hyperon-nucleon interaction models.

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J. Haidenbauer, S. Petschauer, N. Kaiser, U. -G. Meißner, A. Nogga, W. Weise. 2013-04-19. Hyperon-nucleon interaction at next-to-leading order in chiral effective field theory. https://doi.org/10.1016/j.nuclphysa.2013.06.008

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