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19 April 2024

» arxiv » hep-ex/0203021

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Upper limits for neutrino oscillations muon-antineutrino to electron-antineutrino from muon decay at rest
KARMEN collaboration: B. Armbruster ; I. M. Blair ; B. A. Bodmann ; N. E. Booth ; G. Drexlin ; J. A. Edgington ; C. Eichner ; K. Eitel ; E. Finckh ; H. Gemmeke ; J. Hoessl ; T. Jannakos ; P. Juenger ; M. Kleifges ; J. Kleinfeller ; W. Kretschmer ; R. Maschuw ; C. Oehler ; P. Plischke ; J. Reichenbacher ; C. Ruf ; M. Steidl ; J. Wolf ; B. Zeitnitz ;
Date:	13 Mar 2002
Journal:	Phys.Rev. D65 (2002) 112001
Subject:	hep-ex
Abstract:	The KARMEN experiment at the spallation neutron source ISIS used umub from mup--decay at rest in the search for neutrino oscillations umubnueb in the appearance mode, with p( ueb,e+)n as detection reaction of ueb. In total, 15 candidates fulfill all conditions for the ueb 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)<1.7x10e-3 for Dm^2>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 umubnueb.
Source:	arXiv, hep-ex/0203021
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