Two-photon and two-gluon decays of p-wave heavy quarkonium using a covariant light-front approach

Understand

In this paper, a study of two-photon and two-gluon decays in the context of p-wave heavy quarkonia is presented.

• Within the covariant light-front framework, the annihilation rates of scalar and tensor quarkonium states are derived.
• In the absence of free parameters in this case, the results for the charmonium decay widths are consistent with the experimental data.
• However, in comparison to other theoretical calculations, there are large discrepancies in our results regarding bottomonia.