Deviation from Bimaximality due to Planck scale effects

Details Deviation from Bimaximality due to Planck scale effects Deviation from Bimaximality due to Planck scale effects

2006-11-14

arxiv.org/abs/hep-ph/0611186v2

Phys.Lett.B665:63-66,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages and 2 figures

Scientific paper

10.1016/j.physletb.2008.02.070

We consider the effect of Planck scale operators on neutrino mixing. We assume that GUT scale operators give rise to degenerate neutrino masses with bimaximal mixing. Quantum gravity (Planck scale) effects lead to an effective SU(2)L*U(1) invariant dimension-5 Lagrangian involving neutrino and Higgs fields. This gives rise to additional terms in the neutrino mass matrix on electroweak symmetry breaking. These additional terms can be considered as a perturbation to the GUT scale bi-maximal neutrino mass matrix. We assume that the gravitational interaction is flavour blind and compute the deviations of the three neutrino mixing angles due to the Planck scale effects. We find that the changes in theta13, and theta23 are very small but the change in solar mixing angle theta12 can be as large as 3.5 degrees.

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