K* nucleon hyperon form factors and nucleon strangeness

Details K* nucleon hyperon form factors and nucleon strangeness K* nucleon hyperon form factors and nucleon strangeness

1999-04-29

arxiv.org/abs/hep-ph/9904496v2

Phys.Rev. C61 (2000) 055206

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages, 8 figures, new co-author, discussion extended to the momentum dependence of the strange vector form factors

Scientific paper

10.1103/PhysRevC.61.055206

A crucial input for recent meson hyperon cloud model estimates of the nucleon matrix element of the strangeness current are the nucleon-hyperon-K* (NYK*) form factors which regularize some of the arising loops. Prompted by new and forthcoming information on these form factors from hyperon-nucleon potential models, we analyze the dependence of the loop model results for the strange-quark observables on the NYK* form factors and couplings. We find, in particular, that the now generally favored soft N-Lambda-K* form factors can reduce the magnitude of the K* contributions in such models by more than an order of magnitude, compared to previous results with hard form factors. We also discuss some general implications of our results for hadronic loop models.

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