Abstract
We present a radiative one-loop neutrino mass model with hypercharge zero scalar triplet in conjunction with another charged singlet scalar and an additional vectorlike lepton doublet. We study three variants of this mass model: the first one without additional beyond-SM symmetry, the second with imposed DM-stabilizing discrete Z2 symmetry, and the third in which this Z2 symmetry is promoted to the gauge symmetry U(1)D. The two latter cases are scotogenic, with a neutral component of the scalar triplet as a dark matter candidate. In first scotogenic model the Z2-odd dark matter candidate is at the multi-TeV mass scale, so that all new degrees of freedom are beyond the direct reach of the LHC. In second scotogenic setup, with broken U(1)D symmetry the model may have LHC signatures or be relevant to astrophysical observations, depending on the scale of U(1)D breaking.
Highlights
The 126 GeV particle observed at the Large Hadron Collider (LHC) [1,2] corresponds to the Higgs particle h of the electroweak SU (2)L × U (1)Y extension [3] of the original Higgs model [4]
In the present attempt to account both for the mechanism of neutrino mass and for the existence of a stable dark matter (DM) we put forward a variant of the scotogenic radiative neutrino mass model by Ma [5] realized by hypercharge zero triplet scalar field
An earlier study [6] of Weinberg operator generated at one-loop level has been followed by recent classifications of radiative neutrino mass models which provide dark matter candidates, in which the present model with zero hypercharge scalar triplet is listed as type D in [7] and class T3-A in [8]
Summary
The 126 GeV particle observed at the Large Hadron Collider (LHC) [1,2] corresponds to the Higgs particle h of the electroweak SU (2)L × U (1)Y extension [3] of the original Higgs model [4]. In the present attempt to account both for the mechanism of neutrino mass and for the existence of a stable dark matter (DM) we put forward a variant of the scotogenic radiative neutrino mass model by Ma [5] realized by hypercharge zero triplet scalar field. An earlier study [6] of Weinberg operator generated at one-loop level has been followed by recent classifications of radiative neutrino mass models which provide dark matter candidates, in which the present model with zero hypercharge scalar triplet is listed as type D in [7] and class T3-A in [8]. In the concluding section we summarize the results of the proposed variants of the model and list the constraints which may be achieved for the model parameters
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
