Investigations of charmless decays of X(3872) via intermediate meson loops

The charmless decay processes of X(3872) provide us a good platform to study the nature and the decay mechanism of X(3872). Based on a molecular nature of X(3872) as a (D) over barD* bound state, we have investigated the charmless decays X(3872) -> VV and VP via intermediate D*(D) over bar + c.c. meson loops, where V and P stand for light vector and pseudoscalar mesons, respectively. We discuss three cases, i.e., pure neutral components (theta = 0), isospin singlet (theta = pi/4) and neutral components dominant (theta = pi/6), where theta is a phase angle describing the proportion of neutral and charged constituents. The proportion of neutral and charged constituent has an influence on the decay widths of X(3872) -> VV and VP. With the coupling constant of X(3872) to the (D) over barD* channel obtained under the molecule ansatz of X(3872) resonance, the predicted decay widths of X(3872) -> VV are about tens of keVs, while the decay width can reach a few hundreds of keVs for X(3872) -> VP. The dependence of these ratios between different decay modes of X(3872) -> VV and X(3872) -> VP to the mixing angle theta is also investigated. It is expected that the theoretical calculations here can be tested by future experiments.

Automated summary

This study investigates the charmless decay processes of X(3872), providing insights into its nature and decay mechanism. The results show that the proportion of neutral and charged constituents in X(3872) affects its decay widths. The predicted decay widths can be tested by future experiments.