Speaker
Description
Using the framework of the Higgs Effective Field Theory (HEFT), I will discuss multi-Higgs production via gluon-gluon fusion (ggF) and weak boson fusion (WBF). For ggF-induced multi-Higgs production, I will highlight the impact of one-loop HEFT modifications on the Higgs self-couplings and study their effects on the production rates. By including these one-loop radiative corrections and going up to ${\mathcal{O}}(p^4)$ in the momentum expansion, we provide a detailed motivation of the parameter range that the LHC (and future hadron colliders) can explore through accessing these non-standard coupling modifications and momentum dependencies that reveal Higgs boson non-linearities.
In the second part of the talk, I will focus on multi-Higgs interactions with massive gauge bosons, parameterized within the HEFT framework, and discuss multi-Higgs processes via WBF. I will specifically highlight the enhancement of WBF triple Higgs production at the LHC and future colliders from the perspective of unitarity and demonstrate the radiative stability of such analyses under QCD corrections at hadron colliders. Taking unitarity bounds into account, I will discuss the expected sensitivity to electroweak triple Higgs production, considering $HHVV$ and $HHHVV$ effective couplings at future colliders.
