Probing Non-Standard Neutrino Interactions with Neutrino Factories

Details Probing Non-Standard Neutrino Interactions with Neutrino Factories Probing Non-Standard Neutrino Interactions with Neutrino Factories

2007-09-13

arxiv.org/abs/0709.1980v3

JHEP 0712:002,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

47 pages, 22 figures. Color version of Figs. 18, 19 and 22 can be found in the article published in JHEP

Scientific paper

10.1088/1126-6708/2007/12/002

We discuss the sensitivity reach of a neutrino factory measurement to non-standard neutrino interactions (NSI), which may exist as a low-energy manifestation of physics beyond the Standard Model. We use the muon appearance mode \nu_e --> \nu_\mu and consider two detectors, one at 3000 km and the other at 7000 km. Assuming the effects of NSI at the production and the detection are negligible, we discuss the sensitivities to NSI and the simultaneous determination of \theta_{13} and \delta by examining the effects in the neutrino propagation of various systems in which two NSI parameters \epsilon_{\alpha \beta} are switched on. The sensitivities to off-diagonal \epsilon's are found to be excellent up to small values of \theta_{13}. We demonstrate that the two-detector setting is powerful enough to resolve the \theta_{13}-NSI confusion problem. We believe that the results obtained in this paper open the door to the possibility of using neutrino factory as a discovery machine for NSI while keeping its primary function of performing precision measurements of the lepton mixing parameters.

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