Search for a Lorentz invariance violation contribution in atmospheric neutrino oscillations using MACRO data

Details Search for a Lorentz invariance violation contribution in atmospheric neutrino oscillations using MACRO data Search for a Lorentz invariance violation contribution in atmospheric neutrino oscillations using MACRO data

2005-03-08

arxiv.org/abs/hep-ex/0503015v1

Phys.Lett. B615 (2005) 14-18

Physics

High Energy Physics

High Energy Physics - Experiment

8 pages, 2 figures, submitted to Physics Letters B

Scientific paper

10.1016/j.physletb.2005.04.010

Neutrino-induced upward-going muons in MACRO have been analysed in terms of relativity principles violating effects, keeping standard mass-induced atmospheric neutrino oscillations as the dominant source of nu_mu -> nu_tau transitions. The data disfavor these exotic possibilities even at a sub-dominant level, and stringent 90% C.L. limits are placed on the Lorentz invariance violation parameter |Delta v| < 6 * 10^(-24) at sin2theta_v = 0 and |Delta v| < 2.5--5 * 10^(-26) at sin2theta_v = +/-1. These limits can also be re-interpreted as upper bounds on the parameters describing violation of the Equivalence Principle.

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