Testing Radiative Neutrino Mass Generation at the LHC

Abstract

We have investigated in detail a model that contains an additional SU(2) singlet and triplet scalar fields than the Standard Model (SM). This allows the radiative generation of Majorana neutrino masses at two-loop order with the help of doubly charged Higgs bosons that arise from the extended Higgs sector. We studied in detail the phenomenology of the Higgs and neutrino sectors of the model. We give the analytical form of the masses of scalar and pseudoscalar bosons and their mixings, and the structure of the active neutrino mass matrix. It is found that the model accommodates only normal neutrino mass hierarchy, and that there is a large parameter space where the doubly charged Higgs can be observed at the LHC, thereby making it testable at the LHC. Furthermore, the neutrino-less double beta ($\nonu$) decays arise predominantly from exchange processes involving the doubly charged Higgs, whose existence is thus unmistakable if $\nonu$ decays are observed. The production and decays of the doubly charged Higgs are analyzed, and distinct and distinguishing signals are discussed.

22 pages, 13 figures, typos corrected

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• Neutrino mass hierarchy and Majorana CP phases within the Higgs triplet model at the LHC
• Some consequences of a Higgs triplet
• Same-sign single dilepton productions at the LHC
• Radiative Neutrino Mass in Type III Seesaw Model
• Unitarity violation in sequential neutrino mixing in a model of extra dimensions
• Searching for doubly charged Higgs bosons in Möller scattering by resonance effects at linear $e^{-}{e}^{-}$ collider
• Radiative neutrino mass generation and dark energy