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

TL;DR

This paper calculates one-loop contributions from dimension six operators in the SMEFT to Higgs decay into two photons, aiding the interpretation of experimental bounds.

Contribution

It provides the first detailed one-loop calculation of CP-conserving SMEFT effects on Higgs to diphoton decay.

Findings

One-loop SMEFT corrections can significantly affect decay rate interpretations.

Results help refine constraints on new physics from Higgs decay measurements.

The calculation framework can be extended to other processes.

Abstract

We present the calculation of the $\rm CP$ conserving contributions to $\Gamma(h \rightarrow \gamma \gamma)$, 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.