6533b7d6fe1ef96bd1265c07
RESEARCH PRODUCT
Multilepton dark matter signals
Roberto Ruiz De AustriJ.a. CasasJ.a. CasasJuan Antonio Aguilar-saavedraJordi QuilisJordi Quilissubject
Nuclear and High Energy PhysicsParticle physicsPhysics::Instrumentation and DetectorsDark matterFOS: Physical sciencesAstrophysics::Cosmology and Extragalactic Astrophysics7. Clean energy01 natural sciencesFuture Circular ColliderHigh Energy Physics - ExperimentHigh Energy Physics - Experiment (hep-ex)High Energy Physics - Phenomenology (hep-ph)0103 physical scienceslcsh:Nuclear and particle physics. Atomic energy. Radioactivity010306 general physicsBosonPhysicsMissing energyLarge Hadron Collider010308 nuclear & particles physicsElectroweak interactionHigh Energy Physics::PhenomenologyHigh Energy Physics - PhenomenologyUpgradeGauge SymmetryBeyond Standard Modellcsh:QC770-798High Energy Physics::ExperimentLeptondescription
The signatures of dark matter at the LHC commonly involve, in simplified scenarios, the production of a single particle plus large missing energy, from the undetected dark matter. However, in $Z'$-portal scenarios anomaly cancellation requires the presence of extra dark leptons in the dark sector. We investigate the signatures of the minimal scenarios of this kind, which involve cascade decays of the extra $Z'$ boson into the dark leptons, identifying a four-lepton signal as the most promising one. We estimate the sensitivity to this signal at the LHC, the high-luminosity LHC upgrade, a possible high-energy upgrade, as well as a future circular collider. For $Z'$ couplings compatible with current dijet constraints the multilepton signals can reach the $5\sigma$ level already at Run 2 of the LHC. At future colliders, couplings two orders of magnitude smaller than the electroweak coupling can be probed with $5\sigma$ sensitivity.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2020-04-01 |