Testing matter effects in propagation of atmospheric and long-baseline neutrinos

Abstract

We quantify our current knowledge of the size and flavor structure of the matter effects in the evolution of atmospheric and long-baseline neutrinos based solely on the analysis of the corresponding neutrino data. To this aim we generalize the matter potential of the Standard Model by rescaling its strength, rotating it away from the e-e sector, and rephasing it with respect to the vacuum term. This phenomenological parametrization can be easily translated in terms of non-standard neutrino interactions in matter. We show that in the most general case, the strength of the potential cannot be determined solely by atmospheric and long-baseline data. However its flavor composition is very much constrained and the present determination of the neutrino masses and mixing is robust under its presence. We also present an update of the constraints arising from this analysis in the particular case in which no potential is present in the e-mu and e-tau sectors. Finally we quantify to what degree in this scenario it is possible to alleviate the tension between the oscillation results for neutrinos and antineutrinos in the MINOS experiment and show the relevance of the high energy part of the spectrum measured at MINOS.

PDFLaTeX file using JHEP3 class, 25 pages, 7 figures included. Accepted for publication in JHEP

References in corpus (9)

• Phenomenology with Massive Neutrinos
• Measurement of the neutrino mass splitting and flavor mixing by MINOS
• Probing Non-Standard Neutrino Interactions with Neutrino Factories
• Effects of non-standard interactions in the MINOS experiment
• Non-Standard Interaction Effects at Reactor Neutrino Experiments
• MiniBooNE and LSND data: non-standard neutrino interactions in a (3+1) scheme versus (3+2) oscillations
• Loop bounds on non-standard neutrino interactions
• Non-standard interactions using the OPERA experiment
• Can OPERA help in constraining neutrino non-standard interactions?

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