Abstract
ATLAS and CMS have reported an excess in the flavor violating decay of the Higgs boson, h → μτ . We show that this result can be accommodated through a mixing of the Higgs with a flavon, the field responsible for generating the Yukawa matrices in the lepton sector. We employ a version of the Froggatt-Nielsen mechanism at the electroweak scale, with only the leptons and the flavon transforming non-trivially under the corresponding symmetry group. Non-observation of charged lepton flavor violation (LFV) in other processes imposes important constraints on the model, which we find to be satisfied in substantial regions of parameter space.
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Huitu, K., Keus, V., Koivunen, N. et al. Higgs-flavon mixing and h → μτ . J. High Energ. Phys. 2016, 26 (2016). https://doi.org/10.1007/JHEP05(2016)026
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DOI: https://doi.org/10.1007/JHEP05(2016)026