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

Abstract

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.

22 pages LaTex, 8 figures

References in corpus (3)

• A low-lying scalar meson nonet in a unitarized meson model
• Time delayed K+ N reactions and exotic baryon resonances
• Unitarized chiral perturbation theory of hadrons

Cited by in corpus (20)

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• Interaction of eta mesons with nuclei
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• Theoretical support for the $\pi (1300)$ and the recently claimed $f_0(1790)$ as molecular resonances
• Classification of the scalar mesons: a strange pole expedition into charm and beauty territory
• Analysis of averaged multichannel delay times
• Possible eta-mesic 3He states within the finite rank approximation
• Small eta-N scattering lengths favour eta-d and eta-alpha states
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• Resonances and adiabatic invariance in classical and quantum scattering theory
• Time in dissipative tunneling: subtleties and applications
• Tunneling times and bremsstrahlung in alpha decay
• Time Delay and Time Advance in Resonance Theory
• Nonperturbative scalar-meson resonances with open charm and beauty
• On scattering cross sections and durations near an isolated compound-resonance, distorted by the non-resonant background, in the center-of-mass and laboratory systems
• Three body dwell time