Please use this identifier to cite or link to this item: https://hdl.handle.net/2440/113348
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Type: Journal article
Title: Higgs lepton flavour violation: UV completions and connection to neutrino masses
Author: Herrero-García, J.
Rius, N.
Santamaria, A.
Citation: The Journal of High Energy Physics, 2016; 2016(11)
Publisher: Springer
Issue Date: 2016
ISSN: 1126-6708
1029-8479
Statement of
Responsibility: 
Juan Herrero-García, Nuria Rius and Arcadi Santamaria
Abstract: We study lepton violating Higgs (HLFV) decays, first from the effective field theory (EFT) point of view, and then analysing the different high-energy realizations of the operators of the EFT, highlighting the most promising models. We argue why two Higgs doublet models can have a BR(h → τ μ) ∼ 0.01, and why this rate is suppressed in all other realizations including vector-like leptons. We further discuss HLFV in the context of neutrino mass models: in most cases it is generated at one loop giving always BR(h → τ μ) < 10⁻⁴ and typically much less, which is beyond experimental reach. However, both the Zee model and extended left-right symmetric models contain extra SU(2) doublets coupled to leptons and could in principle account for the observed excess, with interesting connections between HLFV and neutrino parameters.
Keywords: Beyond standard model; Higgs physics; neutrino physics
Rights: Open Access, © The Authors. Article funded by SCOAP³. This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.
DOI: 10.1007/JHEP11(2016)084
Published version: http://dx.doi.org/10.1007/JHEP11(2016)084
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Physics publications

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