6533b85ffe1ef96bd12c1162
RESEARCH PRODUCT
The see-saw portal at future Higgs Factories
Enrico BertuzzoAndrea CaputoAndrea CaputoPilar HernándezDaniele BarducciBarbara Melesubject
High Energy Physics - TheoryNuclear and High Energy PhysicsParticle physicsHiggs PhysicsPhysics beyond the Standard ModelFOS: Physical sciences7. Clean energy01 natural sciencesHigh Energy Physics - ExperimentStandard ModelHigh Energy Physics - Experiment (hep-ex)High Energy Physics - Phenomenology (hep-ph)0103 physical scienceslcsh:Nuclear and particle physics. Atomic energy. RadioactivityNeutrino Physics010306 general physicsBeyond Standard Model; Higgs Physics; Neutrino PhysicsPhysics010308 nuclear & particles physicsComputer Science::Information RetrievalHigh Energy Physics::PhenomenologyFermionHigh Energy Physics - PhenomenologyHigh Energy Physics - Theory (hep-th)Beyond Standard ModelHiggs bosonlcsh:QC770-798High Energy Physics::ExperimentCenter of massElectroweak scaleNeutrinoLeptondescription
We consider an extension of the Standard Model with two right-handed singlet fermions with mass at the electroweak scale that induce neutrino masses, plus a generic new physics sector at a higher scale $\Lambda$. We focus on the effective operators of lowest dimension $d=5$, which induce new production and decay modes for the singlet fermions. We assess the sensitivity of future Higgs Factories, such as FCC-ee, CLIC-380, ILC and CEPC, to the coefficients of these operators for various center of mass energies. We show that future lepton colliders can test the cut-off of the theory up to $\Lambda \simeq 500 - 1000\;$TeV, surpassing the reach of future indirect measurements of the Higgs and $Z$ boson widths. We also comment on the possibility of determining the underlying model flavor structure should a New Physics signal be observed, and on the impact of higher dimensional $d=6$ operators on the experimental signatures.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2020-11-09 |