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Higgs lepton flavour violation: UV completions and connection to neutrino masses
KTH, School of Engineering Sciences (SCI), Theoretical Physics.
2016 (English)In: Journal of High Energy Physics (JHEP), ISSN 1126-6708, E-ISSN 1029-8479, no 11, 084Article in journal (Refereed) Published
Abstract [en]

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 -> tau mu) similar to 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 -> tau mu) < 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.

Place, publisher, year, edition, pages
Springer, 2016. no 11, 084
Keyword [en]
Beyond Standard Model, Higgs Physics, Neutrino Physics
National Category
Physical Sciences
URN: urn:nbn:se:kth:diva-197771DOI: 10.1007/JHEP11(2016)084ISI: 000387843300004ScopusID: 2-s2.0-84995602211OAI: diva2:1060266

QC 20161228

Available from: 2016-12-28 Created: 2016-12-08 Last updated: 2016-12-28Bibliographically approved

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