Search for a Lorentz-violating sidereal signal with atmospheric neutrinos in IceCube

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American Physical Society

A search for sidereal modulation in the flux of atmospheric muon neutrinos in IceCube was performed. Such a signal could be an indication of Lorentz-violating physics. Neutrino oscillation models, derivable from extensions to the standard model, allow for neutrino oscillations that depend on the neutrino’s direction of propagation. No such direction-dependent variation was found. A discrete Fourier transform method was used to constrain the Lorentz and CPT-violating coefficients in one of these models. Because of the unique high energy reach of IceCube, it was possible to improve constraints on certain Lorentz-violating oscillations by 3 orders of magnitude with respect to limits set by other experiments.

Astronomy & Astrophysics, Physics, Particles & Fields, Physics
Abbasi, R., et al. (2010): Search for the Lorentz-violating Sidereal Signal with Atmospheric Neutrinos in IceCube. Physical Review D, 82(11). DOI: