On the nature of the X(3872)

TL;DR

This paper investigates the nature of the X(3872) particle, using various models and methods, and concludes it is best described as a meson-meson molecule rather than a deeply bound four-quark state.

Contribution

It provides a comprehensive analysis of charmonium multiquark states and offers a novel coupled channel description of the X(3872).

Findings

No deeply bound four-quark states found.

X(3872) described as a Dar{D}^*-J/a extomega coupled channel state.

Multiple models successfully describe the X(3872).

Abstract

We present recent studies of charmonium multiquark states. We use different interacting models and numerical methods to study deeply bound four-quark states and meson-meson molecules. No deeply bound four-quark states are found in our analysis. A nice description of the X(3872) is obtained as a $D\bar{D}^*-J/\Psi\omega$ coupled channel state.