# SEMINAR

High Scale Unification of CKM and PMNS Mixing Matrices
* Rahul Srivastava*
(**Institute of Mathematical Science, Chennai, India**)

**Sala 2.8.3, IST, Dept. de FĂsica**

**Tuesday, November 3rd, 2015 at 04:00 PM**

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**Abstract**
`
We explore the possibility of `High Scale Unification' of CKM and PMNS
mixing matrices for both Dirac and Majorana type neutrinos. The PMNS
mixing parameters are taken to be identical to the CKM ones at a unifying
high scale. Then, they are evolved to a low scale using MSSM
renormalization-group equations. For both type of neutrinos, the
renormalization group evolution naturally results in a non-zero and small
value of leptonic mixing angle \theta_{13}. One of the important
prediction of this analysis is that, in both cases, the mixing angle
\theta_{23} turns out to be non-maximal for most of the parameter range.
We also elaborate on the important differences between Dirac and Majorana
neutrinos within our framework and how to experimentally distinguish
between the two scenarios.
Furthermore, for both cases, we also derive constraints on the allowed
parameter range for the SUSY breaking and unification scales, for which
this hypothesis works. The results can be tested by present and future
experiments.
Ref: Phys.Rev. D (Rapid Communication), 91, 111301 (2015), arXiv:1312.7384
Phys.Rev. D, 89, 093009 (2014), arXiv:1401.3399`

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