Higgs triplets at like-sign linear colliders and neutrino mixing

Abstract

We study the phenomenology of the type-II seesaw model at a linear e^-e^- collider. We show that the process e^-e^- \rightarrow alpha^-beta^- (alpha, beta = e, mu, tau being charged leptons) mediated by a doubly charged scalar is very sensitive to the neutrino parameters, in particular the absolute neutrino mass scale and the Majorana CP-violating phases. We identify the regions in parameter space in which appreciable collider signatures in the channel with two like-sign muons in the final state are possible. This includes Higgs triplet masses beyond the reach of the LHC.

arXiv comment8 pages, 6 figures

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• ${\mathbf{\mu }}^{-}$- ${\mathbf{e}}^{+}$ Conversion from Short-Range Operators
• The leptonic di-flavor and di-number violation processes at high energy ${\mu }^{\pm }{\mu }^{\pm }$ colliders
• Probing compressed mass spectra in the type-II seesaw model at the LHC
• Search for lepton flavor violation at future lepton colliders
• Precision Higgs Boson Probe of Type-II Seesaw Models