Coupled channel study of a0 resonances

Abstract

The coupled channel model of the a0(980) and a0(1450) resonances has been constructed using the separable pion-eta and K-anti K interactions. We have shown that two S-matrix poles corresponding to the a0(980) meson have significantly different widths in the complex energy plane. The K-anti K to pion-eta branching ratio, predicted in our model near the a0(1450) mass, is in agreement with the result of the Crystal Barrel Collaboration. The K-anti K interaction in the S-wave isovector state is not sufficiently attractive to create a bound a0(980) meson.

15 pages, latex, 4 eps figures, 2 tables, minor corrections, version to appear in Phys. Lett. B

References in corpus (3)

• Mixing of the $f_0$ and $a_0$ scalar mesons in threshold photoproduction
• Large Isospin mixing in phi radiative decay and the spatial size of the f0(980)- a0(980) meson
• A study of the centrally produced eta pi0 and eta pi- systems in pp interactions at 450 GeV/c

Cited by in corpus (14)

• Effective-field theory analysis of the ${\tau }^{-}\to {\pi }^{-}{\pi }^0{\nu }_{\tau }$ decays
• Photoproduction of ${\pi }^{+}{\pi }^{-}$ meson pairs on the proton
• Effective-field theory analysis of the ${\tau }^{-}\to {\eta }^{(\prime )}{\pi }^{-}{\nu }_{\tau }$ decays
• How to employ ${\bar{B}}_d^0\to J/\psi (\pi \eta ,\bar{K}K)$ decays to extract information on $\pi \eta$ scattering
• K Kbar photoproduction and S-P wave interference
• Dalitz plot studies of $D^0\to K_S^0{K}^{+}{K}^{-}$ decays in a factorization approach
• Realistic Equations of State for the Primeval Universe
• Properties of the a0 resonances
• Scalar isovector resonance photoproduction through the final state meson-meson interactions
• Is the a0(980) resonance a K anti-K bound state?
• New parameterization of the resonant production amplitudes near an inelastic threshold
• $a_0(980)$ photoproduction in the coupled channel model
• Near threshold kaon-kaon interaction in the reactions e+ e- --> K+ K- gamma and e+ e- --> K0 K0bar gamma
• Strong interaction between kaons in the reactions e+ e- --> K+ K- gamma and e+ e- --> K0 K0bar gamma