Prediction of the $D_s^{\ast }$ width from a calculation of its radiative decay in full lattice QCD

G. C. Donald, C. T. H. Davies, J. Koponen +1

We determine the rate for $D_s^{\ast }\to D_s\gamma$ for the first time from lattice QCD and include the full effect of $u$, $d$ and $s$ sea quarks. The valence quarks are implement…