Light scalars as tetraquarks: decays and mixing with quarkonia

TL;DR

This paper investigates light scalar mesons below 1 GeV as tetraquarks, analyzing their decay patterns and mixing with quarkonia above 1 GeV using large-N expansion and chiral approaches.

Contribution

It introduces a detailed analysis of light scalar states as tetraquarks, including next-to-leading order decay calculations and mixing effects with quarkonia.

Findings

Tetraquark assignment explains decay patterns of light scalars

Next-to-leading order corrections improve decay width predictions

Mixing with quarkonia affects scalar meson properties

Abstract

The tetraquark assignement for light scalar states below 1 GeV is discussed on the light of strong decays. The next-to-leading order in the large-N expansion for the strong decays is considered. Mixing with quarkonia states above 1 GeV is investigated within a chiral approach and the inclusion of finite-width effects is taken into account.