Higgs production from sterile neutrinos at future lepton colliders

Antusch, Stefan and Cazzato, Eros and Fischer, Oliver. (2016) Higgs production from sterile neutrinos at future lepton colliders. Journal of High Energy Physics, 04. p. 189.

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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 thepresent 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).
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Theoretische Physik (Antusch)
UniBasel Contributors:Antusch, Stefan and Cazzato, Eros and Fischer, Oliver
Item Type:Article, refereed
Article Subtype:Research Article
Publisher: Springer
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:13 Feb 2017 13:38
Deposited On:13 Feb 2017 13:11

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