The X(3872) and other X,Y,Z Resonances as Hidden Charm Meson-Meson Molecules

TL;DR

This paper explores the nature of the X(3872) and related resonances as molecular states formed from charm meson pairs, proposing experimental methods to investigate their structure.

Contribution

It introduces the idea that certain charmonium-like states are hadronic molecules and discusses how radiative decays can reveal their molecular nature.

Findings

Charged and neutral D meson components are approximately equal in the X(3872).

Hidden charm states can be generated from vector meson interactions.

Radiative decay patterns can distinguish molecular states from conventional charmonium.

Abstract

We report on some ideas concerning the nature of the X(3872) resonance and the need for approximately equal charged and neutral components of $D \bar{D}^* +cc$. Then we discuss how some hidden charm states are obtained from the interaction between vector mesons with charm and can be associated to some of the charmonium-like X,Y,Z states. Finally we discuss how the nature of these states could be investigated through different types of radiative decay.