Speaker
Marc Riembau
(IFAE/DESY)
Description
Recently it has been suggested that precision single-Higgs measurements offer an alternative approach to the extraction of the Higgs self coupling with respect the traditional double-Higgs searches. We study how to obtain a parametrically enhanced deviation of the Higgs self-coupling and we estimate how large this deviation can be in a self-consistent EFT framework. We perform a global study on the impact that large deviations on the trilinear might have on the determination of single-Higgs couplings. We advocate that new observables are needed to resolve a degeneracy that appears at large Higgs self-coupling, leading to an interesting interplay between diboson production, single-Higgs data and double Higgs analysis.
Authors
Christophe Grojean
(DESY (Hamburg) and Humboldt University (Berlin))
Giuliano Panico
(Universitat Autònoma de Barcelona (ES))
Stefano Di Vita
(DESY)
Marc Riembau
(IFAE/DESY)
Mr
Thibaud Vantalon
(IFAE / DESY)
