20-27 July 2011
Alpes Congrès - Alpexpo
Europe/Paris timezone

Right unitarity triangles and tri-bimaximal mixing from discrete symmetries and unification

Not scheduled
Dauphine (Alpes Congrès - Alpexpo)


Alpes Congrès - Alpexpo

Poster Flavour Physics and Fundamental Symmetries


Dr Martin Spinrath (SISSA)


We propose new classes of models which predict both tri-bimaximal lepton mixing and a right-angled Cabibbo-Kobayashi-Maskawa (CKM) unitarity triangle, alpha approximately 90 degrees. The ingredients of the models include a supersymmetric (SUSY) unified gauge group such as SU(5), a discrete family symmetry such as A4 or S4, a shaping symmetry including products of Z2 and Z4 groups as well as spontaneous CP violation. We show how the vacuum alignment in such models allows a simple explanation of alpha approximately 90 degrees by a combination of purely real or purely imaginary vacuum expectation values (vevs) of the flavons responsible for family symmetry breaking.

Primary authors

Dr Christoph Luhn (University of Southampton) Dr Martin Spinrath (SISSA) Prof. Stefan Antusch (University of Basel) Prof. Stephen F. King (University of Southampton)

Presentation Materials