Heavy dark matter through the dilaton portal
Résumé
We re-examine current and future constraints on a heavy dilaton coupled to a simple dark sector consisting of a Majorana fermion or a Stückelberg vector field. We include three different treatments of dilaton-Higgs mixing, paying particular attention to a gauge-invariant formulation of the model. Moreover, we also invite readers to re-examine effective field theories of vector dark matter, which we show are missing important terms. Along with the latest Higgs coupling data, heavy scalar search results, and dark matter density/direct detection constraints, we study the LHC bounds on the model and estimate the prospects of dark matter production at the future HL-LHC and 100 TeV FCC colliders. We additionally compute novel perturbative unitarity constraints involving vector dark matter, dilaton and gluon scattering.
Mots clés
Phenomenological Models
dark matter: vector
dark matter: heavy
dark matter: production
dark matter: density
unitarity: constraint
dilaton: coupling
field theory: vector
fermion: Majorana
gluon: scattering
coupling: Higgs
CERN LHC Coll: upgrade
invariance: gauge
effective field theory
direct detection
mixing
FCC
Origine : Publication financée par une institution