Direct determination of neutrino mass parameters at future colliders

Abstract

If the observed light neutrino masses are induced by their Yukawa couplings to singlet right-handed neutrinos, natural smallness of those renders direct collider tests of the electroweak scale neutrino mass mechanisms almost impossible both in the case of Dirac and Majorana (seesaw of type I) neutrinos. However, in the triplet Higgs seesaw scenario the smallness of light neutrino masses may come from the smallness of B-L breaking parameters, allowing sizable Yukawa couplings even for a TeV scale triplet. We show that, in this scenario, measuring the branching fractions of doubly charged Higgs to different same-charged lepton flavours at LHC and/or ILC experiments will allow one to measure the neutrino mass parameters which neutrino oscillation experiments are insensitive to, including the neutrino mass hierarchy, lightest neutrino mass and Majorana phases.

A mistake corrected, experimental errors revised, new references added, conclusions unchanged

References in corpus (6)

• Heavy neutrino signals at large hadron colliders
• Pair Production of Doubly-Charged Scalars: Neutrino Mass Constraints and Signals at the LHC
• Resonant CP Violation due to Heavy Neutrinos at the LHC
• Testing neutrino masses in little Higgs models via discovery of doubly charged Higgs at LHC
• Predictive model for dark matter, dark energy, neutrino masses and leptogenesis at the TeV scale
• Lepton flavor violating signals of a little Higgs model at the high energy linear $e^{+}{e}^{-}$ colliders

Cited by in corpus (6)

• Leptogenesis
• Neutrino Masses and the LHC: Testing Type II Seesaw
• Testing a Neutrino Mass Generation Mechanism at the Large Hadron Collider
• Tetra-maximal Neutrino Mixing and Its Implications on Neutrino Oscillations and Collider Signatures
• Interference bands in decays of doubly-charged Higgs bosons to dileptons in the minimal type-II seesaw model at the TeV scale
• Electroweak constraints on see-saw messengers and their implications for LHC