Speaker
Liping He
(Ohio State University)
Description
If the $X(3872)$ is a weakly bound charm-meson molecule, it can be produced in $e^+ e^-$ annihilation by the creation of $D^{*0} \bar D^{*0}$ from a virtual photon followed by the rescattering of the charm-meson pair into the $X$ and a photon. A triangle singularity produces a narrow peak in the cross section for $e^+ e^- \to X \gamma$ about 2.2 MeV above the $D^{*0} \bar{D}^{*0}$ threshold. We predict the absolutely normalized cross section in the region near the $D^{*0} \bar D^{*0}$ threshold. The peak from the triangle singularity may be observable by the BESIII detector.
Authors
Eric Braaten
(Ohio State University)
Liping He
(Ohio State University)
Kevin Ingles
(The Ohio State University)
