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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)
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)
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, 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)
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)
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, 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. Buckley-Geer, A.(More)
We report the first detailed comparisons of the rates and spectra of neutral-current neutrino interactions at two widely separated locations. A depletion in the rate at the far site would indicate mixing between nu(mu) and a sterile particle. No anomalous depletion in the reconstructed energy spectrum is observed. Assuming oscillations occur at a single(More)
This Letter reports on a search for nu(mu) --> nu(e) transitions by the MINOS experiment based on a 3.14x10(20) protons-on-target exposure in the Fermilab NuMI beam. We observe 35 events in the Far Detector with a background of 27+/-5(stat)+/-2(syst) events predicted by the measurements in the Near Detector. If interpreted in terms of nu(mu) --> nu(e)(More)
P. Adamson, T. Alexopoulos, W. W. M. Allison, G. J. Alner, K. Anderson, C. Andreopoulos, M. Andrews, R. Andrews, C. Arroyo, S. Avvakumov, D. S. Ayres, B. Baller, B. Barish, M. A. Barker, 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, V. Bocean, B. Bock, G. J.(More)