Upper limits for neutrino oscillations muon-antineutrino to electron-antineutrino from muon decay at rest

Preprint

13 March 2002

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.hep-ex/0203021

Abstract

The KARMEN experiment at the spallation neutron source ISIS used \numub from \mup--decay at rest in the search for neutrino oscillations \numubnueb in the appearance mode, with p(\nueb,e+)n as detection reaction of \nueb. In total, 15 candidates fulfill all conditions for the \nueb signature, in agreement with the background expectation of 15.8+-0.5 events, yielding no indication for oscillations. A single event based likelihood analysis leads to upper limits on the oscillation parameters: sin^2(2theta)100 eV^2 and Dm^2<0.055 eV^2 for sin^2(2theta)=1 at 90% confidence. Thus, KARMEN does not confirm the LSND experiment and restricts significantly its favored parameter region for \numubnueb.

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Version 1, 2002-03-13, ArXiv
Published version: Physical Review D, 65 (11), 112001.

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