Beaming neutrino and antineutrinos across the Earth to focus muon-tau flavor mixing and to disentangle CPT violation puzzle

Details Beaming neutrino and antineutrinos across the Earth to focus muon-tau flavor mixing and to disentangle CPT violation puzzle Beaming neutrino and antineutrinos across the Earth to focus muon-tau flavor mixing and to disentangle CPT violation puzzle

2010-12-15

arxiv.org/abs/1012.3245v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

22 pages, 16 figures

Scientific paper

A new MINOS result hint a different anti-neutrino mass splitting and different mixing angle with respect to the neutrino. We propose a future long baseline experiment with a beam of neutrinos through the Earth in the direction of DeepCore at the South Pole, to test their anti-muon disappearance or (for CPT violation) appearance at the longest distances, compatible with present sources and tuned to DeepCore minimal detectable energies.Such an experiment will measure tau and anti-tau appearance as well at high rate (a tau a day) even at minimal 1% Opera-like experiment. Our tuned detection experiment will lead to a much clearer signature (ten sigma or above) because of the known primary neutrino flux, and its energy spectrum and distance, along with the correlated observation or absence of muon neutrino signals. We suggest to tune muon neutrinos at quasi mono-chromatic energy spectra, by bending their parent pions (toward underground Icecube target) in a spectrometric fashion. Such an experiment may be performed by beaming neutrinos from CERN or from FNL to Super Kamiokande (SK) or, much better, to IceCube DeepCore. Indeed DeepCore reveals signals at 20 GeV where the neutrino oscillation in the Earth may becomes extreme. Our suggested anti-muon beaming may sharply confirm or disfavor the CPT violation, by one an anti-tau a day (in CPT conserved scenario) versus nearly five anti-muon a week in CPT violated case, even at 1% Opera-like experiment.

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