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Improved search for muon-neutrino to electron-neutrino oscillations in MINOS

  • P. Adamson
  • , D. J. Auty
  • , D. S. Ayres
  • , C. Backhouse
  • , G. Barr
  • , M. Betancourt
  • , M. Bishai
  • , A. Blake
  • , G. J. Bock
  • , D. J. Boehnlein
  • , D. Bogert
  • , S. V. Cao
  • , S. Cavanaugh
  • , D. Cherdack
  • , S. Childress
  • , J. A.B. Coelho
  • , L. Corwin
  • , D. Cronin-Hennessy
  • , I. Z. Danko
  • , J. K. De Jong
  • N. E. Devenish, M. V. Diwan, M. Dorman, C. O. Escobar, J. J. Evans, E. Falk, G. J. Feldman, M. V. Frohne, H. R. Gallagher, R. A. Gomes, M. C. Goodman, P. Gouffon, N. Graf, R. Gran, K. Grzelak, A. Habig, J. Hartnell, R. Hatcher, A. Himmel, A. Holin, X. Huang, J. Hylen, G. M. Irwin, Z. Isvan, D. E. Jaffe, C. James, D. Jensen, T. Kafka, S. M.S. Kasahara, G. Koizumi

Research output: Contribution to journalArticlepeer-review

Abstract

We report the results of a search for νe appearance in a νμ beam in the MINOS long-baseline neutrino experiment. With an improved analysis and an increased exposure of 8.2×1020 protons on the NuMI target at Fermilab, we find that 2sin2(θ23) sin2(2θ13)<0.12(0.20) at 90% confidence level for δ=0 and the normal (inverted) neutrino mass hierarchy, with a best-fit of 2sin2(θ23)sin2(2θ13)=0. 041-0.031+0.047(0.079-0.053+0.071). The θ13=0 hypothesis is disfavored by the MINOS data at the 89% confidence level.

Original languageEnglish (US)
Article number181802
JournalPhysical review letters
Volume107
Issue number18
DOIs
StatePublished - Oct 27 2011

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