The Vector Meson And Heavy Meson Strong Interaction

TL;DR

This paper calculates coupling constants between light vector mesons and heavy mesons using light-cone QCD sum rules, aiding the understanding of heavy meson molecular states and exotic mesons near thresholds.

Contribution

It provides stable sum rule calculations of these couplings within heavy quark effective theory, a novel application for studying exotic mesons.

Findings

Coupling constants are stable with Borel parameter variations.

Results support the molecular interpretation of certain exotic states.

Method can be used for future studies of heavy meson interactions.

Abstract

We calculate the coupling constants between the light vector mesons and heavy mesons within the framework of the light-cone QCD sum rule in the leading order of heavy quark effective theory. The sum rules are very stable with the variations of the Borel parameter and the continuum threshold. The extracted couplings will be useful in the study of the possible heavy meson molecular states. They may also helpful in the interpretation of the proximity of X(3872), Y(4260) and Z(4430) to the threshold of two charmed mesons through the couple-channel mechanism.