ICHEP2012

Jul 4 – 11, 2012
Melbourne Convention and Exhibition Centre
Australia/Melbourne timezone
ICHEP2012 - 36th International Conference for High Energy Physics

The Simplest Neutrino Mass Matrix Revisited

Jul 5, 2012, 5:30 PM
15m
Room 217 (Melbourne Convention and Exhibition Centre)

Room 217

Melbourne Convention and Exhibition Centre

Melbourne Australia
Parallel Sessions Track 8. Neutrinos

Speaker

Prof. Paul Fraser Harrison (University of Warwick (UK))

Description

In 2004, two of us published a texture, the Simplest'' neutrino mass matrix, which predicted $\sin{\theta_{13}}=\sqrt{2\Delta m^2_{sol}/3\Delta m^2_{atm}}$ and large $\delta_{CP}$. Using today's measured values for neutrino mass-squared differences, this prediction gives $\sin^2\! 2{\theta_{13}}\simeq 0.086^{+0.003}_{-0.006}$, compared with a measured value, found by averaging the results of the Daya Bay and RENO experiments, of $\sin^2\! 2{\theta_{13}}=0.097\pm0.012$. Here, we develop that texture separately for the cases of Dirac and Majorana neutrinos. For Dirac neutrinos, we use the measured value of $\theta_{13}$ to predict the lightest neutrino mass. For the Majorana case, we present a specific model underlying this successful texture, and we explore its phenomenology in the context of the See-saw mechanism. Large $CP$-violation is a generic prediction of the texture.

Summary

Successful neutrino mass matrix texture updated and embedded in a full model with Majorana neutrinos. Recent theta_13 values accommodated and large CP violation predicted.

Primary authors

Prof. Paul Fraser Harrison (University of Warwick (UK)) Mr Rama Krishnan (University of Warwick) William Scott (STFC - Science & Technology Facilities Council (GB))

 Slides