Lepton flavor violation in the Simplest Little Higgs model

Details Lepton flavor violation in the Simplest Little Higgs model Lepton flavor violation in the Simplest Little Higgs model

2011-01-15

arxiv.org/abs/1101.2936v2

JHEP 1103:080,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

41 pages, 8 figures; minor changes and one reference added, version to appear in JHEP

Scientific paper

10.1007/JHEP03(2011)080

The flavor sector of Little Higgs models based on product groups, notably the Littlest Higgs with T parity (LHT), has been extensively studied and some amount of fine tuning was found to be required to meet the experimental constraints. However, no such attention has been paid to other classes of models. Here we analyze the phenomenology of flavor mixing in the lepton sector of a simple group model, the Simplest Little Higgs (SLH). We obtain the Feynman rules of the SLH in the 't Hooft-Feynman gauge up to the necessary order and calculate the leading contributions to the rare processes mu -> e gamma, mu -> eee and mu-e conversion in nuclei. We find results comparable to those of the LHT model, because in both cases they arise at the one-loop level. These require the flavor alignment of the Yukawa couplings of light and heavy leptons at the per cent level or an effective scale of around 10 TeV.

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