The $Y(4230)$ as a $D_1 \bar{D}$ molecule

TL;DR

This paper proposes that the $Y(4230)$ particle is a hadronic molecule composed of $D_1$ and $ar{D}$, supported by a comprehensive fit to various experimental data sets in the 4.2 to 4.35 GeV mass range.

Contribution

It introduces a molecular interpretation of $Y(4230)$ and demonstrates consistency with multiple experimental channels through a simultaneous data fit.

Findings

$Y(4230)$ can be described as a $D_1 ar{D}$ molecule.

The model explains signals across diverse decay channels.

The fit covers the mass range from 4.2 to 4.35 GeV.

Abstract

We show that the currently available data are consistent with $Y(4230)$ being a $D_1 \bar{D}$ hadronic molecule. By a simultaneous fit to data from $e^+ e^- \rightarrow D^0 D^{* -} \pi^+,\: J/\psi \pi^+ \pi^-,\: J/\psi K^+ K^-,\: h_c \pi^+ \pi^-,\: J/\psi \eta,\: \chi_{c0} \omega,\: \chi_{c1}(3872) \gamma$ and $\mu^+ \mu^-$, we demonstrate that this single state can explain the experimental signals in the mass range from $4.2$ to $4.35\, \rm{GeV}.$