Matter Effects in Upward-Going Muons and Sterile Neutrino Oscillations
High Energy Physics - Experiment
2012-08-27 v2
Abstract
The angular distribution of upward-going muons produced by atmospheric neutrinos in the rock below the MACRO detector show anomalies in good agreement with two flavor neutrino-mu ==> neutrino-tau oscillations with maximum mixing and Delta m**2 around 0.0024 eV**2. Exploiting the dependence of magnitude of the matter effect on oscillation channel, and using a set of 809 upward-going muons observed in MACRO, we show that the two flavor neutrino-mu ==> neutrino-sterile oscillation is disfavored with 99% C.L. with respect to neutrino-mu ==> neutrino-tau.
Keywords
Cite
@article{arxiv.hep-ex/0106049,
title = {Matter Effects in Upward-Going Muons and Sterile Neutrino Oscillations},
author = {The MACRO Collaboration},
journal= {arXiv preprint arXiv:hep-ex/0106049},
year = {2012}
}
Comments
7 pages 4 figures Submitted to Physics Letters B