Journal Article

PreJuSER-59429

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Meson exchange hyperon-nucleon interaction based on correlated pi pi/K(K)over-bar exchange

Haidenbauer, J.FZJ*

2007
Springer Berlin

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Please use a persistent id in citations: doi:10.1140/epja/i2007-10467-5

Abstract: We present a new model for the hyperon-nucleon (Lambda N , Sigma N interaction, derived within the meson exchange framework. The model incorporates the standard one-boson exchanges of the lowest pseudoscalar and vector meson multiplets with coupling constants fixed by SU(6) flavor symmetry relations. As a new feature, the contribution in the scalar-isoscalar (sigma sector is derived from a microscopic model of correlated pi pi and K (K) over bar exchange. The same model is also used to constrain the interaction resulting from the vector-isovector (rho exchange channel. Additional short-ranged ingredients of the model in the scalar-isovector (a(0)) and scalar-isospin-1/2 (kappa channels are likewise viewed as arising from meson-meson correlations but are treated phenomenologically. With this model a satisfactory reproduction of the available hyperon-nucleon data is achieved.

Keyword(s): nucleon: interaction ; Sigma ; Lambda ; meson: exchange ; vector meson: multiplet ; symmetry: flavor ; pseudoscalar meson: multiplet ; symmetry: SU(6) ; exchange: one-boson ; coupling constant ; hyperon ; meson meson: correlation ; f0(600) ; kappa meson ; cross section ; numerical calculations: interpretation of experiments

Note: Record converted from VDB: 12.11.2012

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Research Program(s):

1. Physik der Hadronen und Kerne (P53)

Appears in the scientific report 2007

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