The Hyperon-nucleon interaction: Conventional versus effective field theory approach

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

Contribution to a conference proceedings/Contribution to a book

The Hyperon-nucleon interaction: Conventional versus effective field theory approach

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

2007

Lecture Notes in Physics. - 724 (2007). - Berlin, Springer. - 978-3-540-72038-6. - S. 113 - 140 [10.1007/978-3-540-72039-3_4]

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Please use a persistent id in citations: http://hdl.handle.net/2128/10529 doi:10.1007/978-3-540-72039-3_4

Abstract: Hyperon-nucleon interactions are presented that are derived either in the conventional meson-exchange picture or within leading order chiral effective field theory. The chiral potential consists of one-pseudoscalar-meson exchanges and non-derivative four-baryon contact terms. With regard to meson-exchange hyperon-nucleon models we focus on the new potential of the Juelich group, whose most salient feature is that the contributions in the scalar--isoscalar (\sigma) and vector--isovector (\rho) exchange channels are constrained by a microscopic model of correlated \pi\pi and KKbar exchange.

Keyword(s): nucleon hyperon: scattering amplitude ; coupled channel ; nucleon Lambda: interaction ; nucleon Sigma: interaction ; Lippmann-Schwinger equation ; effective Lagrangian: chiral ; effective potential ; baryon: four-fermion interaction ; meson: exchange ; pseudoscalar meson ; scalar meson ; vector meson ; exchange: (2pseudoscalar meson) ; nucleon hyperon: elastic scattering ; channel cross section: momentum dependence ; angular distribution: momentum dependence ; scattering length ; partial wave analysis ; hydrogen: hypernucleus ; helium: hypernucleus ; energy levels ; numerical calculations