S-wave Kpi scattering in chiral perturbation theory with resonances

Details S-wave Kpi scattering in chiral perturbation theory with resonances S-wave Kpi scattering in chiral perturbation theory with resonances

2000-06-05

arxiv.org/abs/hep-ph/0006045v1

Nucl.Phys.B587:331-362,2000

Physics

High Energy Physics

High Energy Physics - Phenomenology

40 pages, 6 figures

Scientific paper

10.1016/S0550-3213(00)00479-X

We present a detailed analysis of S-wave Kpi scattering up to 2 GeV, making use of the resonance chiral Lagrangian predictions together with a suitable unitarisation method. Our approach incorporates known theoretical constraints at low and high energies. The present experimental status, with partly conflicting data from different experiments, is discussed. Our analysis allows to resolve some experimental ambiguities, but better data are needed in order to determine the cross-section in the higher-energy range. Our best fits are used to determine the masses and widths of the relevant scalar resonances in this energy region.

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