Exotic mesons with hidden charm as diquark-antidiquark states

Abstract

Exotic mesons with hidden strange ($s\bar{s}$) and heavy quark pairs ($Q\bar{Q}$), where $Q=c,b$, are considered as diquark-antidiquark systems, $(Qs)(\bar{Q}\bar{s})$. 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 D-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 $((Qq)(\bar{Q}\bar{q})$, ($(Qs)(\bar{Q}\bar{s}$)), ($(Qq)(\bar{Q}\bar{s}))$- states ($q=u,d$) is suggested.

Comments: 20 pages, 10 figures