Physics
Scientific paper
Mar 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008cls..conf..234a&link_type=abstract
CPT AND LORENTZ SYMMETRY. Proceedings of the Fourth Meeting. Held 8-11 August 2007 in Bloomington, USA. Edited by V Alan Kostele
Physics
Scientific paper
The AMANDA-II neutrino telescope detects upward-going atmospheric muon neutrinos penetrating the Earth from the Northern Hemisphere via the Cherenkov light of neutrino-induced muons, allowing the reconstruction of the original neutrino direction. Due to the high energy threshold of about 50 GeV, the declination spectrum is minimally affected by mass-induced neutrino oscillations; however, alternative oscillation models predicting effects at high energy can be tested and constrained. Of particular interest are models that allow one to test Lorentz invariance and the equivalence principle. Using the AMANDA-II data from the years 2000 to 2003, a sample of 3401 candidate neutrino-induced events was selected. No indication for alternative oscillation effects was found. For maximal mixing angles, an upper limit is set on both the Lorentz violation parameter δc/c and the equivalence principle violation parameter 2|ϕ|δγ of 5.3 × 10-27 at the 90% confidence level.
Ahrens James
Kelley John Lawrence
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