Collision times in pi-pi and pi-K scattering and spectroscopy of meson resonances

Details Collision times in pi-pi and pi-K scattering and spectroscopy of meson resonances Collision times in pi-pi and pi-K scattering and spectroscopy of meson resonances

2003-07-14

arxiv.org/abs/hep-ph/0307184v1

Nucl.Phys.A724:357-374,2003

Physics

High Energy Physics

High Energy Physics - Phenomenology

22 pages LaTex, 8 figures

Scientific paper

10.1016/S0375-9474(03)01555-0

Using the concept of collision time (time delay) introduced by Eisenbud and Wigner and its connection to on-shell intermediate unstable states, we study mesonic resonances in pi-pi and pi-K scattering. The time-delay method proves its usefulness by revealing the spectrum of the well-known rho- and K*-mesons and by supporting some speculations on rho-mesons in the 1200 MeV region. We use this method further to shed some light on more speculative meson resonances, among others the enigmatic scalars. We confirm the existence of chiralons below 1 GeV in the unflavoured and strange meson sector.

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