3 papers
hep-ph2013
A new A4 model for lepton mixing
P. M. Ferreira, L. Lavoura, P. O. Ludl
We present a new model of the lepton sector that uses a family symmetry A4 to make predictions for lepton mixing which are invariant under any permutation of the three flavours. We…
hep-ph2012
Maximal CP violation in lepton mixing from a model with Delta(27) flavour symmetry
P. M. Ferreira, W. Grimus, L. Lavoura +1
We propose a simple mechanism which enforces |U_{mu j}| = | U_{tau j}| forall j = 1,2,3 in the lepton mixing matrix U. This implies maximal atmospheric neutrino mixing and a maxima…
hep-ph2001
Minimisation of a one-loop charge breaking effective potential
P. M. Ferreira
We compute the field derivatives of a one-loop charge breaking effective potential and analyse their effect in its minimisation. The impact on charge breaking bounds on the MSSM pa…