Analysis of strong decays of the charmed mesons $D_J(2580)$, $D_J^*(2650)$, $D_J(2740)$, $D^*_J(2760)$, $D_J(3000)$, $D_J^*(3000)$

TL;DR

This paper tentatively identifies several newly observed charmed mesons and studies their strong decay processes using heavy meson effective theory, providing explicit decay width formulas and ratios to aid in their classification.

Contribution

It offers a theoretical analysis of the strong decays of newly observed charmed mesons, proposing decay width ratios to help confirm their quantum number assignments.

Findings

Explicit decay width expressions derived

Decay width ratios proposed for meson identification

Potential for future experimental validation of coupling constants

Abstract

In this article, we tentatively identify the charmed mesons $D_J(2580)$, $D_J^*(2650)$, $D_J(2740)$, $D^*_J(2760)$, $D_J(3000)$, $D_J^*(3000)$ observed by the LHCb collaboration according to their spin, parity and masses, then study their strong decays to the ground state charmed mesons plus light pseudoscalar mesons with the heavy meson effective theory in the leading order approximation, and obtain explicit expressions of the decay widths. The ratios among the decay widths can be used to confirm or reject the assignments of the newly observed charmed mesons. The strong coupling constants in the decay widths can be fitted to the experimental data in the future at the LHCb, BESIII, KEK-B and $\rm{\bar{P}ANDA}$.