Exotic mesons with hidden charm as diquark–antidiquark states

Abstract

Exotic mesons with hidden strange [Formula: see text] and heavy quark pairs [Formula: see text], where [Formula: see text], [Formula: see text], are considered as diquark–antidiquark systems, [Formula: see text]. Taking into account that these states can recombinate into two-meson ones, we study the interplay of these states in terms of the dispersion relation [Formula: see text]-function technique. The classification of exotic mesons is discussed, coefficients for decay modes are given, predictions for new states are presented. The nonet structure for [Formula: see text], [Formula: see text], [Formula: see text]-states [Formula: see text] is suggested.