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Measurement of the neutrino mass splitting and flavor mixing by MINOS

Research output: Contribution to journalJournal article

Published

  • P. Adamson
  • C. Andreopoulos
  • R. Armstrong
  • D. J. Auty
  • D. S. Ayres
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  • J. Mitchell
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  • L. Mualem
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  • M. Orchanian
  • R. Ospanov
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  • R. B. Patterson
  • G. Pawloski
  • G. F. Pearce
  • D. A. Petyt
  • S. Phan-budd
  • R. K. Plunkett
  • X. Qiu
  • J. Ratchford
  • T. M. Raufer
  • B. Rebel
  • P. A. Rodrigues
  • C. Rosenfeld
  • H. A. Rubin
  • M. C. Sanchez
  • J. Schneps
  • P. Schreiner
  • P. Shanahan
  • C. Smith
  • A. Sousa
  • P. Stamoulis
  • M. Strait
  • N. Tagg
  • R. L. Talaga
  • J. Thomas
  • M. A. Thomson
  • G. Tinti
  • R. Toner
  • G. Tzanakos
  • J. Urheim
  • P. Vahle
  • B. Viren
  • A. Weber
  • R. C. Webb
  • C. White
  • L. Whitehead
  • S. G. Wojcicki
  • T. Yang
  • R. Zwaska
  • MINOS Collaboration
Article number181801
Journal publication date2/05/2011
JournalPhysical Review Letters
Journal number18
Volume106
Number of pages6
Original languageEnglish

Abstract

Measurements of neutrino oscillations using the disappearance of muon neutrinos from the Fermilab NuMI neutrino beam as observed by the two MINOS detectors are reported. New analysis methods have been applied to an enlarged data sample from an exposure of 7.25×1020 protons on target. A fit to neutrino oscillations yields values of |Δm2|=(2.32-0.08+0.12)×10-3  eV2 for the atmospheric mass splitting and sin⁡2(2θ)>0.90 (90% C.L.) for the mixing angle. Pure neutrino decay and quantum decoherence hypotheses are excluded at 7 and 9 standard deviations, respectively.

Bibliographic note

© 2011 American Physical Society