Radiative decay Y(4260) -> X(3872) + gamma involving hadronic molecular and charmonium components

TL;DR

This paper models the radiative decay of Y(4260) to X(3872) plus a photon, considering both molecular and charmonium components, and predicts decay rates consistent with current experimental data.

Contribution

It introduces a phenomenological Lagrangian approach to describe the decay involving mixed molecular and charmonium states, providing new insights into their composite structure.

Findings

Predicted decay rates align with experimental data

Y(4260) modeled as a purely molecular state

X(3872) has a dominant molecular component

Abstract

We apply a phenomenological Lagrangian approach to the radiative decay Y(4260) -> X(3872) + gamma. The Y(4260) and X(3872) resonances are considered as composite states containing both molecular hadronic and charmonium components. Having a leading molecular component in the X(3872) and a sole molecular configuration for the Y(4260) results in a prediction compatible with present data.