Strong and radiative decays of the scalars f0(980) and a0(980) in a hadronic molecule approach

Abstract

We analyze the electromagnetic and strong decay properties of the light scalars a0(980) and f0(980) within a hadronic molecule interpretation. Both scalars are discussed within a covariant and gauge invariant model which also allows for finite size effects due to their spatially extended structure in the K Kbar-bound state picture. Allowing for f0-a0 mixing we also study its influence on the radiative decays f0/a0 to gamma gamma, f0/a0 to gamma omega, and f0/a0 to gamma rho as well as the phi production of the f0 and a0. Furthermore, we apply our formalism to describe the strong f0 to pi pi and a0 to pi eta decay properties.

16 pages, 6 figures, typos corrected, accepted for publication in Phys. Rev. D

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• Further signatures to support the tetraquark mixing framework for the two light-meson nonets
• Constraints on CP-odd ALP couplings from EDM limits of fermions
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• The scalar-isovector sector in the extended Linear Sigma Model
• Tetraquark mixing supported by the partial decay widths of two light-meson nonets
• Investigating $S$-wave bound states composed of two pseudoscalar mesons
• Dynamical generation of hadronic resonances in effective models with derivative interactions
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