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Deviation from bimaximality due to Planck scale effects

DSpace at IIT Bombay

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Title Deviation from bimaximality due to Planck scale effects
 
Creator KORANGA, BIPIN SINGH
UMA SANKAR, S
NARAYAN, MOHAN
 
Subject quantum gravity
standard model
electroweak theories
cosmic ray neutrinos
 
Description We consider the effect of Planck scale operators on neutrino mixing. We assume that the neutrino masses and mixings arise through physics at a scale intermediate between Planck scale and the electroweak breaking scale. We also assume that, just above the electroweak breaking scale, neutrino masses are nearly degenerate and their mixing is bimaximal. Quantum gravity (Planck scale) effects lead to an effective SU(2)L×U(1) invariant dimension-5 Lagrangian involving Standard Model lepton and Higgs fields. On electroweak symmetry breaking, this operator gives rise to corrections to the above masses and mixings. These additional terms can be considered as a perturbation to the bimaximal neutrino mass matrix. The nature of gravitational interaction demands that the elements of this perturbation matrix should be independent of flavour indices. We compute the deviations of the three neutrino mixing angles due to these Planck scale effects. We find that the changes in θ13 and θ23 are very small but the change in solar mixing angle θ12 can be as large as 3.5°.
 
Publisher Elsevier
 
Date 2009-04-08T06:49:15Z
2011-11-25T20:51:03Z
2011-12-26T13:08:36Z
2011-12-27T05:56:33Z
2009-04-08T06:49:15Z
2011-11-25T20:51:03Z
2011-12-26T13:08:36Z
2011-12-27T05:56:33Z
2008
 
Type Article
 
Identifier Physics Letters B 665(2-3), 63-66
0370-2693
http://dx.doi.org/10.1016/j.physletb.2008.02.070
http://hdl.handle.net/10054/1156
http://dspace.library.iitb.ac.in/xmlui/handle/10054/1156
 
Language en