Minimal Flavour Violation and Neutrino Masses without R-parity

Details Minimal Flavour Violation and Neutrino Masses without R-parity Minimal Flavour Violation and Neutrino Masses without R-parity

2011-11-16

arxiv.org/abs/1111.3941v3

Physics

High Energy Physics

High Energy Physics - Phenomenology

23 pages, 3 figures. References added. Minor changes, to appear in JHEP

Scientific paper

We study the extension of the Minimal Flavour Violation (MFV) hypothesis to the MSSM without R-parity. The novelty of our approach lies in the observation that supersymmetry enhances the global symmetry of the kinetic term and in the fact that we consider as irreducible sources of the flavour symmetry breaking all the couplings of the superpotential including the R-parity violating ones. If R-parity violation is responsible for neutrino masses, our setup can be seen as an extension of MFV to the lepton sector. We analyze two patterns based on the non-abelian flavour symmetries SU(3)^4 \otimes SU(4) and SU(3)^5. In the former case the total lepton number and the lepton flavour number are broken together, while in the latter the lepton number can be broken independently by an abelian spurion, so that visible effects and peculiar correlations can be envisaged in flavour changing charged lepton decays like \ell_i \rightarrow \ell_j \gamma.

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