Improved measurement of muon antineutrino disappearance in MINOS

P. Adamson, D. S. Ayres, C. Backhouse, G. Barr, M. Bishai, A. Blake, G. J. Bock, D. J. Boehnlein, D. Bogert, S. V. Cao, S. Childress, J. A B Coelho, L. Corwin, D. Cronin-Hennessy, I. Z. Danko, J. K. De Jong, N. E. Devenish, M. V. Diwan, C. O. Escobar, J. J. EvansE. 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, S. Kopp, M. Kordosky, A. Kreymer, K. Lang, J. Ling, P. J. Litchfield, L. Loiacono, P. Lucas, W. A. Mann, M. L. Marshak, M. Mathis, N. Mayer, R. Mehdiyev, J. R. Meier, M. D. Messier, D. G. Michael, W. H. Miller, S. R. Mishra, J. Mitchell, C. D. Moore, L. Mualem, S. Mufson, J. Musser, D. Naples, J. K. Nelson, H. B. Newman, R. J. Nichol, J. A. Nowak, W. P. Oliver, M. Orchanian, R. B. Pahlka, J. Paley, R. B. Patterson, G. Pawloski, S. Phan-Budd, R. K. Plunkett, X. Qiu, A. Radovic, J. Ratchford, B. Rebel, C. Rosenfeld, H. A. Rubin, M. C. Sanchez, J. Schneps, A. Schreckenberger, P. Schreiner, R. Sharma, A. Sousa, M. Strait, N. Tagg, R. L. Talaga, J. Thomas, M. A. Thomson, G. Tinti, R. Toner, D. Torretta, G. Tzanakos, J. Urheim, P. Vahle, B. Viren, J. J. Walding, A. Weber, R. C. Webb, C. White, L. Whitehead, S. G. Wojcicki, R. Zwaska

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    Abstract

    We report an improved measurement of ν ̄μ disappearance over a distance of 735 km using the MINOS detectors and the Fermilab Main Injector neutrino beam in a ν ̄μ-enhanced configuration. From a total exposure of 2.95×1020 protons on target, of which 42% have not been previously analyzed, we make the most precise measurement of Δm ̄2=[2.62-0.28+0.31(stat)±0. 09(syst)]×10 -3eV2 and constrain the ν ̄μ mixing angle sin2(2θ̄)>0.75 (90% C.L.). These values are in agreement with Δm2 and sin2(2θ) measured for ν μ, removing the tension reported in. © 2012 American Physical Society.
    Original languageEnglish
    Article number191801
    JournalPhysical Review Letters
    Volume108
    Issue number19
    DOIs
    Publication statusPublished - 11 May 2012

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