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

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

1998-04-10

arxiv.org/abs/hep-ph/9804273v1

Phys.Rev.D58:054012,1998

Physics

High Energy Physics

High Energy Physics - Phenomenology

28 pages, 17 figures

Scientific paper

10.1103/PhysRevD.58.054012

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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