Search for exotic contributions to atmospheric neutrino oscillations

Details Search for exotic contributions to atmospheric neutrino oscillations Search for exotic contributions to atmospheric neutrino oscillations

2005-08-19

arxiv.org/abs/hep-ex/0508041v1

Phys.Atom.Nucl.69:1842-1846,2006

Physics

High Energy Physics

High Energy Physics - Experiment

Presented at the 29th I.C.R.C., Pune, India (2005)

Scientific paper

10.1134/S1063778806110068

The energy spectrum of neutrino-induced upward-going muons in MACRO was analysed in terms of relativity principles violating effects, keeping standard mass-induced atmospheric neutrino oscillations as the dominant effect. The data disfavor these possibilities even at a sub-dominant level; stringent 90% C.L. limits are placed on the Lorentz invariance violation parameter $|\Delta v| < 6 \times 10^{-24}$ at $\sin 2{\theta}_v$ = 0 and $|\Delta v| < 2.5 \div 5 \times 10^{-26}$ at $\sin 2{\theta}_v$ = $\pm$1. The limits can be re-interpreted as bounds on the Equivalence Principle violation parameters.

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