Abstract
We present here the final results of experiments searching for neutrino oscillations, carried out by the CHARM Collaboration. The data — taking took place in 1983. The first experiment was performed by exposing two detectors simultaneously to the CERN PS low energyv µ beam. In the second experiment the full CHARM detector was exposed to the wide-band horn-focusedv µ beam of the CERN SPS. Complete details of the experiments and data reduction are presented. No statistically significant signals for neutrino oscillations were observed. Our 90% CL limits in the appearance experiment (v µ→v e ) exclude Δm 2≧0.19 eV2 for complete mixing (sin22θ=1), and sin22θ≧0.008 for the region Δm 2≧30 eV2. These results, and the limits observed for (v µ→v x ) (disappearance of (v µ), are in agreement with those of most other experiments but exclude part of the region previously reported as a possible indication ofv µ→v e oscillations.
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On leave of absence from Weizmann Institute, Rehovoth, Israel
Supported by Bundesministerium für Forschung und Technologie, Bonn, FRG
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CHARM Collaboration., Bergsma, F., Dorenbosch, J. et al. A search for neutrino oscillations. Z. Phys. C - Particles and Fields 40, 171–192 (1988). https://doi.org/10.1007/BF01555880
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DOI: https://doi.org/10.1007/BF01555880