Observation of a New $X(3872)$ Production Process $e^+e^-\to\omega X(3872)$

TL;DR

This paper reports the first observation of the production process e+e- to omega X(3872) at specific energies, with significant statistical confidence, providing new insights into the production mechanisms of X(3872).

Contribution

It presents the first observation of the e+e- to omega X(3872) process, revealing potential connections to non-trivial structures in the energy dependence.

Findings

First observation of e+e- to omega X(3872) process with 7.8σ significance.

Measured cross sections and upper limits at various energies.

Indications of non-trivial structures influencing the signals.

Abstract

Using $4.7~\rm fb^{-1}$ of $e^+e^-$ collision data at center-of-mass energies from 4.661 to 4.951 GeV collected by the BESIII detector at the BEPCII collider, we observe the $X(3872)$ production process $e^{+}e^{-}\to\omega X(3872)$ for the first time. The significance is $7.8\sigma$, including both the statistical and systematic uncertainties. The $e^+e^-\to\omega X(3872)$ Born cross section and the corresponding upper limit at 90\% confidence level at each energy point are reported. The line shape of the cross section indicates that the $\omega X(3872)$ signals may be from the decays of some non-trivial structures.