Cross section line shape of $e^+e^-\to\chi_{c0}\omega$ around the $Y(4260)$ mass region

TL;DR

The paper explains the cross section line shapes of $e^+e^-\to \chi_{c0}\omega$ around the $Y(4260)$ mass region using a molecular model where $Y(4260)$ is a hadronic molecule mainly composed of $ar{D}D_1(2420)+c.c.$, consistent with other reactions.

Contribution

It provides a molecular interpretation of $Y(4260)$ explaining the line shapes in multiple reactions, supporting the hadronic molecule hypothesis.

Findings

Line shape of $e^+e^-\to \chi_{c0}\omega$ is consistent with a $Y(4260)$ molecular state.

$Y(4260)$ as a $ar{D}D_1(2420)+c.c.$ molecule explains various experimental observations.

Supports the molecular picture of $Y(4260)$ across different processes.

Abstract

We demonstrate that the recent measurement of the cross section line shapes of $e^+e^-\to \chi_{c0}\omega$ can be naturally explained by the molecular picture for $Y(4260)$ where the $Y(4260)$ is treated as a hadronic molecule dominated by $\bar{D}D_1(2420)+c.c.$ This result is consistent with properties extracted for $Y(4260)$ as the $\bar{D}D_1(2420)+c.c.$ molecular state in other reactions such as $e^+e^-\to J/\psi\pi\pi$, $h_c\pi\pi$, $\bar D D^*\pi +c.c.$, and $\gamma X(3872)$.