Higgs production from sterile neutrinos at future lepton colliders

Abstract

In scenarios with sterile (right-handed) neutrinos that are subject to an approximate "lepton-number-like" symmetry, the heavy neutrinos (i.e. the mass eigenstates) can have masses around the electroweak scale and couple to the Higgs boson with, in principle, unsuppressed Yukawa couplings while accounting for the smallness of the light neutrinos' masses. In these scenarios, the on-shell production of heavy neutrinos and their subsequent decays into a light neutrino and a Higgs boson constitutes a hitherto unstudied resonant contribution to the Higgs production mechanism. We investigate the relevance of this resonant mono-Higgs production mechanism in leptonic collisions, including the present experimental constraints on the neutrino Yukawa couplings, and we determine the sensitivity of future lepton colliders to the heavy neutrinos. With Monte Carlo event sampling and a simulation of the detector response we find that, at future lepton colliders, neutrino Yukawa couplings below the percent level can lead to observable deviations from the SM and, furthermore, the sensitivity improves with higher center-of-mass energies (for identical integrated luminosities).

26 pages, 9 figures, 7 tables; v2: references added

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• Constraining Sterile Neutrinos from Precision Higgs Data
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• Invisible Decays in Higgs Pair Production
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• A Model for Pseudo-Dirac Neutrinos: Leptogenesis and Ultra-High Energy Neutrinos
• Pair production of heavy neutrinos in next-to-leading order QCD at the hadron colliders in the inverse seesaw framework
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• Lepton flavor violating decay of SM-like Higgs in a radiative neutrino mass model
• Testing electroweak scale seesaw models at $e^{-}\gamma$ and $\gamma \gamma$ colliders
• The Scale Invariant Scotogenic Model: Dark Matter and the Scalar Sector
• Identifying the nature of dark matter at $e^{-}{e}^{+}$ Colliders
• H Marks the Spot: Searching for Exotic Production of Higgs + X to Map Out New Physics
• Higgs boson production in the $U(1{)}_{B-L}$ model at the ILC
• Riding the Seesaw: What Higgsstrahlung May Reveal about Massive Neutrinos