Probing Non-Standard Neutrino Physics at Neutrino Factory and T2KK
arXiv:0805.2435
Abstract
We discuss ways to explore non-standard interactions (NSI) which neutrinos may possess by expressing them as effective four Fermi operators with coefficient of the order of (M_{W} / M_{NP})^2 ~0.01 (0.0001) for energy scales of new physics as M_{NP} ~1 (10) TeV. Neutrino Factory is a prime candidate for such apparatus that can reach to the extreme precision. I describe a two detector setting, one at baseline L~3000 km and the other at L~7000 km, which is able to solve the notorious theta_{13}-NSI confusion, and possibly also the two-phase confusion. The resultant sensitivities to off-diagonal NSI elements ε's are excellent, |ε_{e tau}| \simeq a few \times10^{-3} and |ε_{e mu}| \simeq a few \times10^{-4}. Our results suggest a new picture of neutrino factory as a hunting machine for NSI while keeping its potential of precision measurement of lepton mixing parameters. Sensitivities to NSI by T2KK and the related settings are also discussed.
arXiv commentWritten version of a talk presented at the ``Fourth International Workshop on Neutrino Oscillations in Venice --Ten Years after the Neutrino Oscillations--'', (NO-VE 2008) Venice, Italy. 15-18, April 2008. 20 pages, 9 figures
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