We calculate the predicted width for the radiative decay of a $1^{ ++}$ heavy meson via the channel $1^{ ++} \to 1^{ --} +\gamma$ in the covariant light-front quark model. Specifically, we compute the decay widths for $\chi_{ c1}(1P) \to J/\psi + \gamma$ and $\chi_{ b1}(nP) \to \Upsilon(n'S) + \gamma$. The results are compared with experimental data and with predictions from calculations based on nonrelativistic models and their extensions to include relativistic effects.
Categories: hep-ph
