Tetra-Quark Interpretation of X(3872) and Z_c(3900) Revisited

TL;DR

This paper reexamines the tetra-quark model for X(3872) and Z_c(3900), aligning it with recent observations of bottom-strange mesons, and discusses their possible relationships within this framework.

Contribution

The paper updates the tetra-quark interpretation of X(3872) and Z_c(3900) to incorporate recent bottom-strange meson data, proposing a consistent assignment within the model.

Findings

Compatibility of X(3872) and Z_c(3900) with bottom partner assignments

Revised tetra-quark interpretation aligns with new bottom-strange meson observations

Support for tetra-quark structure in exotic mesons

Abstract

In relation to the newly observed bottom-strange X^{+,-}(5568) mesons, we revisit our tetra-quark interpretation of X(3872) and Z_c(3900). It is discussed that our assignment of X^{+,-}(5568) to charged components of iso-triplet bottom partners of D_{s0}^+(2317) is compatible with the revised version of our tetra-quark interpretation of X(3872) and Z_c(3900).