Speaker
Marco Fedele
(Università "La Sapienza" - Roma)
Description
I will talk about the constraints on the trilinear Higgs self-coupling that arise from loop effects in the W boson mass and the Weinberg angle predictions. The contributions to these precision observables arise from two-loop diagrams featuring an anomalous trilinear Higgs self coupling, parametrized by means of a single parameter $\k_\lambda$, effectively rescaling the Standard Model coupling. The computation has been carried out in the Unitary Gauge, but I will explicitly show that these contributions are gauge independent. The bounds found on the trilinear Higgs self-coupling are competitive with those coming from Higgs-pair production.
