Flavour violation in a supersymmetric T ' model

作者：Merlo Luca^*; Rigolin Stefano; Zaldivar Bryan

来源：The Journal of High Energy Physics, 2011, 2011(11): 047.

DOI：10.1007/JHEP11(2011)047

• Rare Decays
• Supersymmetric Standard Model
• Discrete and Finite Symmetries
• Global Symmetries

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 is an element of [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 beta are considered. We analyse in detail T' u -> e gamma prediction, concerning the leptonic sector, while for the hadronic sector we concentrate on b -> s gamma and neutral B meson mass differences Delta M-s,M-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.

• 出版日期2011-11