Production of the X(3872) in charmonia radiative decays
Feng-Kun Guo, Christoph Hanhart, Ulf-G. Mei{\ss}ner, Qian Wang and, Qiang Zhao
TL;DR
This paper explores the potential production of the X(3872) particle through radiative decays of charmonia, highlighting specific energy regions and the influence of molecular states on transition strengths.
Contribution
It proposes specific energy regions for observing X(3872) in radiative decays and links molecular state compositions to transition strengths.
Findings
Optimal energy regions identified around Y(4260) and 4.45 GeV.
Large radiative transition strength if Y(4260) and X(3872) are molecular states.
Implication that molecular structures influence decay processes.
Abstract
We discuss the possibilities of producing the X(3872), which is assumed to be a D \bar D^* bound state, in radiative decays of charmonia. We argue that the ideal energy regions to observe the X(3872) associated with a photon in e^+e^- annihilations are around the Y(4260) mass and around 4.45 GeV, due to the presence of the S-wave D \bar D_1(2420) and D^* \bar D_1(2420) threshold, respectively. Especially, if the Y(4260) is dominantly a D \bar D_1 molecule and the X(3872) a D \bar D^* molecule, the radiative transition strength will be quite large.
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