Latest Results of the KARMEN2 Experiment

Preprint

2 August 2000

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.hep-ex/0008002

Abstract

The neutrino experiment KARMEN at the beam stop neutrino source ISIS investigates the oscillation channel numubar->nuebar in the appearance mode by looking for p(nuebar,e+)n reactions. An analysis of data collected from February 1997 through March 2000 with the KARMEN2 experimental setup reveals 11 candidate events in good agreement with the background expectation of 12.3+-0.6 events. Hence, there is no indication of an oscillation signal. A maximum likelihood analysis of the data leads to an upper limit (at 90% confidence level) for the mixing angle of sin^2(2theta) < 1.3x10^-3 at large Dm^2 and Dm^2 < 0.049 eV^2 for sin^2(2theta)=1. The anomaly in the time spectrum of events induced by nue and numubar seen in the KARMEN1 data could not be confirmed with the KARMEN2 data.

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All Related Versions

Version 1, 2000-08-02, ArXiv
Published version: Nuclear Physics B - Proceedings Supplements, 91 (1-3), 191.

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