Electroweak corrections within and beyond the SM: phenomenology and techniques

by Hantian Zhang (CERN)

Monday 22 Sept 2025, 14:00 → 15:00 Europe/Zurich

4/3-006 - TH Conference Room (CERN)

In this talk, I will present recent developments on electroweak (EW) corrections within and beyond the SM for Higgs production processes at the LHC and future e+e- colliders. 

At e+e- colliders, I will demonstrate that EW corrections can serve as sensitive probes of new physics probes. This will be illustrated through a comprehensive study of Higgs plus neutrino-pair production in the two-Higgs-doublet model, where NLO EW corrections can lead to several percent deviations from the SM predictions, even in the Higgs alignment limit. 

At the LHC, EW corrections play an important role for precision studies of single and double Higgs production, especially in the boosted high-energy region. In this context, I will discuss analytic techniques and the tool AsyInt for evaluating massive two-loop four-point Feynman integrals at high energies, which also uncovers new elliptic constants as a by-product.

EW_Zhang_QCDseminar_2025.pdf