2012/11/30 by Roy, Subhankar, Singh, N. Nimai
#FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph)
paper · doi:10.48550/arxiv.1211.7207
The usual Bi-Maximal (BM) neutrino mixing faces an inherent problem in lowering the solar mixing angle below tan2θ12=0.50 when charged lepton correction is taken. This minimum θ12 is achievable only if CP violation is absent. We start with a new model which incorporates a new idea of mixing developed recently, called Bi-Large (BL) mixing, similar to BM mixing execpt that the former chooses rather θ13 as Cabibbo angle (θc) than zero. We apply this mixing in the neutrino sector, followed by a charged lepton correction with the CKM type matrix Ul. This model marks a prediction on θ23 to lie within the first octant. The CP violating phase δCP dictates the prediction of all the three mixing angles. A proper choice of δCP leads to the predictions of all the three mixing angles including θ12, to align very precisely with the experimental bestfits. This close agreement thus hoists Bi-Large mixing as an important and promising mixing scheme, in contrast to BM or TBM mixing as a first approximation. A formal derivation of BL mixing from discrete symmetry will be an important investigation in neutrino physics.