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Flavour violation in a supersymmetric T′ model

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Abstract

We describe the phenomenology of the flavour changing neutral current sector of a supersymmetric model, invariant under the T′ discrete flavour group. This model has been proposed in ref. [1] and describes realistic leptonic and hadronic masses and mixings and predicts the amount of flavour changing in terms of the small flavour breaking parameter u ∈ [0.007, 0.05]. For small values of u, the model almost reduces to the MSUGRA framework, while sizable deviations from MSUGRA can be, instead, observed when larger values of u and tan β are considered. We analyse in detail T′ μ → eγ prediction, concerning the leptonic sector, while for the hadronic sector we concentrate on b → sγ and neutral B meson mass differences \( \Delta {M_{{{B_{{s,d}}}}}} \). Moreover, for the first time a comparative study on leptonic and hadronic observables for the T′ model is performed. The experimental data on FCNC observables severely constrain the model in the small m 0 region. Conversely for larger m 0 , the T′ model satisfies all the bounds.

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Authors and Affiliations

  1. Physik-Department, Technische Universität München, James-Franck-Strasse, D-85748, Garching, Germany

    Luca Merlo

  2. TUM Institute for Advanced Study, Technische Universität München, Lichtenbergstrasse 2a, D-85748, Garching, Germany

    Luca Merlo

  3. Dipartimento di Fisica “G. Galilei”, Università di Padova and INFN, Sezione di Padova, Via Marzolo 8, I-35131, Padua, Italy

    Stefano Rigolin

  4. Instituto de F´ısica Teórica, IFT-UAM/CSIC, Nicolás Cabrera 15, UAM Cantoblanco, 28049, Madrid, Spain

    Bryan Zaldıvar

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  1. Luca Merlo
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  2. Stefano Rigolin
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Correspondence to Luca Merlo.

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Merlo, L., Rigolin, S. & Zaldıvar, B. Flavour violation in a supersymmetric T′ model. J. High Energ. Phys. 2011, 47 (2011). https://doi.org/10.1007/JHEP11(2011)047

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