Interpreting the LSND anomaly: sterile neutrinos or CPT-violation or...?

Preprint

15 January 2002

preprint
Published by arXiv in arXiv

Abstract

We first study how sterile neutrinos can fit the 5sigma bar-nu_mu --> bar-nu_e LSND anomaly: 3+1 solutions give a poor fit, but better than than 2+2 solutions (the best fit regions are somewhat different, so that MiniBoone could discriminate). If instead MiniBoone will find no nu_mu --> nu_e signal, we will have a hint for CPT violation. Already now, unlike sterile neutrinos, CPT-violating neutrino masses can nicely accomodate all safe and unsafe data. We study how much CPT must be conserved according to atmospheric and K2K data and list which CPT-violating signals could be discovered by forthcoming solar and long-baseline experiments.

Keywords

STERILE NEUTRINOS
CPT VIOLATING
LSND ANOMALY
DISCRIMINATE
VIOLATING

All Related Versions

Version 1, 2002-01-15, ArXiv
Version 2, 2002-05-29, ArXiv
Version 3, 2003-02-12, ArXiv
Version 4, 2003-02-20, ArXiv
Published version: Physics Letters B, 539 (1-2), 91.

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