Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2010-12-10
Physics
High Energy Physics
High Energy Physics - Phenomenology
3 pages, 2 figures. Talk given at the 12th International Workshop on Neutrino Factories, Superbeams and Beta Beams (NuFact10),
Scientific paper
If a Z' gauge boson from a gauged L_mu - L_tau symmetry is very light, it is associated with a long-range leptonic force. In this case the particles in the Sun create via mixing of the Z' with the Standard Model Z a flavor-dependent potential for muon neutrinos in terrestrial long-baseline experiments. The potential changes sign for anti-neutrinos and hence can lead to apparent differences in neutrino and anti-neutrino oscillations without introducing CP or CPT violation. This could for instance explain the recently found discrepancy in the MINOS experiment. We obtain the associated parameters of gauged L_mu - L_tau required to explain this anomaly. The consequences for future long-baseline experiments are also discussed, and we compare the scenario to standard NSIs. When used to explain MINOS, both approaches have severe difficulties with existing limits.
Heeck Julian
Rodejohann Werner
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