Sep 5 – 10, 2021
Online
Europe/Lisbon timezone

Probing Higgs-portal dark matter with vector-boson fusion

Sep 5, 2021, 4:50 PM
25m
Online

Online

Talk Energy frontier physics beyond the standard model Energy frontier physics beyond the standard model

Speaker

Eric Madge (Weizmann Institute)

Description

We constrain the Higgs-portal model employing the vector-boson fusion channel at the LHC. In particular, we include the phenomenologically interesting parameter region near the Higgs resonance, where the Higgs-boson mass is close to the threshold for dark-matter production and a running-width prescription has to be employed for the Higgs-boson propagator. Limits for the Higgs-portal coupling as a function of the dark-matter mass are derived from the CMS search for invisible Higgs-boson decays in vector-boson fusion at 13 TeV. Furthermore, we perform projections for the 14 TeV HL-LHC and the 27 TeV HE-LHC taking into account a realistic estimate of the systematic uncertainties. The respective upper limits on the invisible branching ratio of the Higgs boson reach a level of 2 % and constrain perturbative Higgs-portal couplings up to dark-matter masses of about 110 GeV.

Primary author

Eric Madge (Weizmann Institute)

Co-author

Christophe Grojean (DESY (Hamburg) and Humboldt University (Berlin))

Presentation materials