Speaker
Dr
Pier Paolo Giardino
(Brookhaven National Laboratory)
Description
The Higgs trilinear coupling $\lambda_3$ is still a missing piece in the Standard Model puzzle. Although its theoretical value can be extracted from its relation to the mass of the Higgs and the Fermi constant, its measurement through the double Higgs production is particularly challenging. We explore the possibility of probing an anomalous trilinear coupling indirectly, through the production and decay of a single Higgs. Indeed, although these processes do not depend on $\lambda_3$ at tree level, they are sensitive to the trilinear coupling at NLO. This gives us the opportunity to derive the constraints on $\lambda_3$ from several observables, like the signal strength of the various channels or the $t\bar{t}H$ cross-section.
Primary author
Dr
Pier Paolo Giardino
(Brookhaven National Laboratory)
