Speaker
Description
Gluon-gluon fusion is the dominant channel for Higgs production at the Large Hadron Collider (LHC) and will remain a key probe of Higgs interactions at the High-Luminosity LHC, where improved experimental precision will require equally precise theoretical predictions. In this talk we focus on Higgs production via gluon-gluon fusion within the Standard Model Effective Field Theory (SMEFT) at NLO, including two-loop corrections computed using both analytic and numerical techniques. The calculation considers the full set of dimension-six operators contributing to the $gg \to h$ amplitude.
The analysis includes a phenomenological study of the SMEFT coefficients, with particular emphasis on the operator $C_{\phi G}$, which gives large contributions to the cross section. The results are compared with existing approaches in the literature, as well as with bounds obtained from global-fit analyses.