On nature of scalar a_0(980) and f_0(980)-mesons

TL;DR

This paper critically examines the properties of the scalar mesons a_0(980) and f_0(980), arguing that the four-quark model better explains their unusual features and discussing experiments to confirm this.

Contribution

It provides a comprehensive comparison of models for these mesons and advocates for the four-quark model as the most plausible explanation.

Findings

Four-quark model better explains meson properties

Discussion of experimental approaches to resolve meson structure

Critical analysis of two-quark and molecular models

Abstract

It is presented a critical consideration of all unusual properties of the scalar a_0(980) and f_0(980)-mesons in the four-quark, two-quark and molecular models. The arguments are adduced that the four-quark model is more preferable. It is discussed the complex of experiments that could finally resolve this issue.