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General lepton mixing in holographic composite Higgs models

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Abstract

We introduce a scenario of lepton mixing in holographic composite Higgs models based on non-abelian discrete symmetries of the form G f = X × Z N , broken to Z 2 × Z 2 × Z N in the elementary sector and to \( Z_N^{{(D)}} \) in the composite sector with \( Z_N^{{(D)}} \) being the diagonal subgroup of a Z N  ⊂ X and the external Z N . By choosing X = Δ(96) or Δ(384), a non-vanishing θ13 of order 0.1 is naturally obtained. We apply our considerations to a 5D model in warped space for the particular cases of X = S 4 , A 5 , Δ(96) and Δ(384) and N = 3 or 5. Lepton flavour violating processes and electric dipole moments are well below the current bounds, with the exception of μ → eγ that puts a very mild constraint on the parameter space of the model, for all presented choices of G f .

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Authors and Affiliations

  1. Dipartimento di Fisica ‘G. Galilei’, Università di Padova, INFN, Sezione di Padova, Via Marzolo 8, I-35131, Padua, Italy

    Claudia Hagedorn

  2. Scuola Internazionale Superiore di Studi Avanzati (SISSA) and INFN, Via Bonomea 265, I-34136, Trieste, Italy

    Marco Serone

  3. Abdus Salam International Centre for Theoretical Physics (ICTP), Strada Costiera 11, I-34151, Trieste, Italy

    Marco Serone

Authors
  1. Claudia Hagedorn
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  2. Marco Serone
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Correspondence to Claudia Hagedorn.

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ArXiv ePrint: 1110.4612

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Hagedorn, C., Serone, M. General lepton mixing in holographic composite Higgs models. J. High Energ. Phys. 2012, 77 (2012). https://doi.org/10.1007/JHEP02(2012)077

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  • DOI: https://doi.org/10.1007/JHEP02(2012)077

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