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Published September 1, 2018 | Submitted + Published
Journal Article Open

Doubly-charged scalars in the type II seesaw mechanism: Fundamental symmetry tests and high-energy searches


We analyze the sensitivity of low-energy fundamental symmetry tests to interactions mediated by doubly-charged scalars that arise in type II seesaw models of neutrino mass and their left-right symmetric extensions. We focus on the next generation measurement of the parity-violating asymmetry in Møller scattering planned by the MOLLER collaboration at Jefferson Laboratory. We compare the MOLLER sensitivity to that of searches for charged lepton flavor violation (CLFV) and neutrinoless double beta-decay (0νββ-decay) as well as present and possible future high-energy collider probes. We show that for the simplest type-II seesaw scenario, CLFV searches have the greatest sensitivity. However, in a left-right symmetric extension where the scale of parity-breaking is decoupled from the SU(2)_R-breaking scale, the MOLLER experiment will provide a unique probe of scalar triplet interactions in the right-handed sector for a doubly-charged scalar mass up to ∼10 TeV and help elucidate the mechanism of 0νββ-decay.

Additional Information

© 2018 The Author(s). Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3. (Received 4 July 2018; published 12 September 2018) We acknowledge useful discussions and correspondence with Krishna Kumar. B. D. also thanks Albert de Roeck for a helpful comment and the organizers of WHEPP XIV at IIT, Kanpur and MASS2018 at CP3-Origins, Odense, for the local hospitality, where part of this work was done. Y. Z. is grateful to the University of Maryland, College Park, for the hospitality and local support where part of the work was done. M. J. R. M. was supported in part under U.S. Department of Energy Contract No. DE-SC0011095.

Attached Files

Published - PhysRevD.98.055013.pdf

Submitted - 1806.08499


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