Higgs decay to two photons at one-loop in the SMEFT

We present the calculation of the $\mathrm{C}\mathrm{P}$ conserving contributions to $\mathrm{\Gamma }(h\to \gamma \gamma )$, from dimension six operators at one-loop order, in the linear Standard Model Effective Field Theory. We discuss the impact of these corrections on interpreting current and future experimental bounds on this decay.