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arXiv · hep-ph/9804273

Evidence for a scalar kappa(900) resonance in pi-K scattering

D. Black·A. H. Fariborz·F. Sannino·J. Schechter
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Abstract

Motivated by the $1/N_c$ expansion, we study a simple model in which the pi-K scattering amplitude is the sum of a current-algebra contact term and resonance pole exchanges. This phenomenological model is crossing symmetric and, when a putative light strange scalar meson, kappa, is included, satisfies the unitarity bounds to well above 1 GeV. The model also features chiral dynamics, vector meson dominance and appropriate interference between the established scalar K*(1430) resonance and its predicted background. We briefly discuss the physical significance of the results and directions for further work.

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D. Black, A. H. Fariborz, F. Sannino, J. Schechter. 1998-04-10. Evidence for a scalar kappa(900) resonance in pi-K scattering. https://doi.org/10.1103/physrevd.58.054012

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