Constraints from precision measurements on the hadron-molecule interpretation of X,Y,Z resonances

TL;DR

This paper uses precise experimental measurements to constrain the hadron-molecule interpretation of certain exotic resonances, highlighting current limitations and potential extensions to other similar states.

Contribution

It provides a model-independent analysis that constrains the molecular interpretation of X(3872) and discusses applicability to Y,Z resonances.

Findings

Binding energy and width measurements restrict molecular models.

Current data cannot definitively confirm or exclude the molecular nature.

Methodology can be extended to other Y,Z resonances.

Abstract

The precise measurement of binding energy, total width and DDpi branching fraction, constrains, in a model independent way, the loosely bound hadron molecule interpretation of X(3872). A full discernment is not yet possible on the basis of present data. Similar considerations might be extended to all those Y,Z resonances susceptible of a molecular description.