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Search for muon to electron neutrino oscillations

  • Experimental Physics
  • Published:
Zeitschrift für Physik C Particles and Fields

Abstract

A search for νμ → ν e and\(\bar \nu _\mu \to \bar \nu _e \) oscillations has been carried out with the CHARM II detector exposed to the CERN wide band neutrino beam. The data were collected over five years, alternating beams mainly composed of muon-neutrinos and muon-antineutrinos. The number of interactions of ν e and\(\bar \nu _e \) observed is comparable with the number of events expected from flux calculations. For large squared mass differences the upper limits obtained on the mixing angle aresin 22θ < 9.4 · 10−3 for νμ oscillating to ν e andsin 22θ < 4.8 · 10−3 for\(\bar \nu _\mu \) to\(\bar \nu _e \), at the 90% confidence level. Combining neutrino and antineutrino data the upper limit is 5.6 · 10−3.

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On leave of absence from ITEP (Moscow)

Supported by the German Bundesministerium für Forschung und Technologie under contract numbers 05-4HH22P and 05-4MU12P

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CHARM II Collaboration., Vilain, P., Wilquet, G. et al. Search for muon to electron neutrino oscillations. Z. Phys. C - Particles and Fields 64, 539–544 (1994). https://doi.org/10.1007/BF01957768

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  • DOI: https://doi.org/10.1007/BF01957768

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