C . Andreopoulos

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This Letter reports results from the MINOS experiment based on its initial exposure to neutrinos from the Fermilab NuMI beam. The rates and energy spectra of charged current nu(mu) interactions are compared in two detectors located along the beam axis at distances of 1 and 735 km. With 1.27 x 10(20) 120 GeV protons incident on the NuMI target, 215 events(More)
The T2K experiment observes indications of ν(μ) → ν(e) appearance in data accumulated with 1.43×10(20) protons on target. Six events pass all selection criteria at the far detector. In a three-flavor neutrino oscillation scenario with |Δm(23)(2)| = 2.4×10(-3)  eV(2), sin(2)2θ(23) = 1 and sin(2)2θ(13) = 0, the expected number of such events is 1.5±0.3(syst).(More)
This Letter reports new results from the MINOS experiment based on a two-year exposure to muon neutrinos from the Fermilab NuMI beam. Our data are consistent with quantum-mechanical oscillations of neutrino flavor with mass splitting |Deltam2| = (2.43+/-0.13) x 10(-3) eV2 (68% C.L.) and mixing angle sin2(2theta) > 0.90 (90% C.L.). Our data disfavor two(More)
The T2K experiment has observed electron neutrino appearance in a muon neutrino beam produced 295 km from the Super-Kamiokande detector with a peak energy of 0.6 GeV. A total of 28 electron neutrino events were detected with an energy distribution consistent with an appearance signal, corresponding to a significance of 7.3σ when compared to 4.92±0.55(More)
New data from the T2K neutrino oscillation experiment produce the most precise measurement of the neutrino mixing parameter θ23. Using an off-axis neutrino beam with a peak energy of 0.6 GeV and a data set corresponding to 6.57×10(20) protons on target, T2K has fit the energy-dependent νμ oscillation probability to determine oscillation parameters. The 68%(More)
We report on measurements of neutrino oscillation using data from the T2K long-baseline neutrino experiment collected between 2010 and 2013. In an analysis of muon neutrino disappearance alone, we find the following estimates and 68% confidence intervals for the two possible mass hierarchies: Normal Hierarchy: sin θ23 = 0.514 +0.055 −0.056 and ∆m 2 32 =(More)
P. Adamson, C. Andreopoulos, K. E. Arms, R. Armstrong, D. J. Auty, D. S. Ayres, C. Backhouse, J. Barnett, G. Barr, W. L. Barrett, B. R. Becker, M. Bishai, A. Blake, B. Bock, G. J. Bock, D. J. Boehnlein, D. Bogert, C. Bower, S. Cavanaugh, J. D. Chapman, D. Cherdack, S. Childress, B. C. Choudhary,* J. H. Cobb, S. J. Coleman, D. Cronin-Hennessy, A. J. Culling,(More)
A search for a sidereal modulation in the MINOS near detector neutrino data was performed. If present, this signature could be a consequence of Lorentz and CPT violation as predicted by the effective field theory called the standard-model extension. No evidence for a sidereal signal in the data set was found, implying that there is no significant change in(More)
P. Adamson, C. Andreopoulos, D. J. Auty, D. S. Ayres, C. Backhouse, P. D. Barnes, Jr., G. Barr, W. L. Barrett, M. Bishai, A. Blake, G. J. Bock, D. J. Boehnlein, D. Bogert, C. Bower, S. Cavanaugh, J. D. Chapman, D. Cherdack, S. Childress, B. C. Choudhary,* J. A. B. Coelho, J. H. Cobb, S. J. Coleman, J. P. Cravens, D. Cronin-Hennessy, A. J. Culling, I. Z.(More)
P. Adamson, C. Andreopoulos, K. E. Arms, R. Armstrong, D. J. Auty, S. Avvakumov, D. S. Ayres, B. Baller, B. Barish, P. D. Barnes, Jr., G. Barr, W. L. Barrett, E. Beall,* B. R. Becker, A. Belias, T. Bergfeld, R. H. Bernstein, D. Bhattacharya, M. Bishai, A. Blake, B. Bock, G. J. Bock, J. Boehm, D. J. Boehnlein, D. Bogert, P. M. Border, C. Bower, E.(More)