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arXiv · 1108.0015

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

MINOS Collaboration·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·S. Kopp·M. Kordosky·A. Kreymer·K. Lang·G. Lefeuvre·J. Ling·P. J. Litchfield·L. Loiacono·P. Lucas·W. A. Mann·M. L. Marshak·M. Mathis·N. Mayer·A. M. McGowan·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·J. P. Ochoa-Ricoux·W. P. Oliver·M. Orchanian·J. Paley·R. B. Patterson·G. Pawloski·G. F. Pearce·S. Phan-Budd·R. K. Plunkett·X. Qiu·J. Ratchford·B. Rebel·C. Rosenfeld·H. A. Rubin·M. C. Sanchez·J. Schneps·A. Schreckenberger·P. Schreiner·P. Shanahan
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Abstract

We report the results of a search for $\nu_{e}$ appearance in a $\nu_{\mu}$ beam in the MINOS long-baseline neutrino experiment. With an improved analysis and an increased exposure of $8.2\times10^{20}$ protons on the NuMI target at Fermilab, we find that $2\sin^2(\theta_{23})\sin^2(2\theta_{13})<0.12\ (0.20)$ at 90% confidence level for $\delta\mathord{=}0$ and the normal (inverted) neutrino mass hierarchy, with a best fit of $2\sin^2(\theta_{23})\sin^2(2\theta_{13})\,\mathord{=}\,0.041^{+0.047}_{-0.031}\ (0.079^{+0.071}_{-0.053})$. The $\theta_{13}\mathord{=}0$ hypothesis is disfavored by the MINOS data at the 89% confidence level.

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MINOS Collaboration, 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, S. Kopp, M. Kordosky, A. Kreymer, K. Lang, G. Lefeuvre, J. Ling, P. J. Litchfield, L. Loiacono, P. Lucas, W. A. Mann, M. L. Marshak, M. Mathis, N. Mayer, A. M. McGowan, 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, J. P. Ochoa-Ricoux, W. P. Oliver, M. Orchanian, J. Paley, R. B. Patterson, G. Pawloski, G. F. Pearce, S. Phan-Budd, R. K. Plunkett, X. Qiu, J. Ratchford, B. Rebel, C. Rosenfeld, H. A. Rubin, M. C. Sanchez, J. Schneps, A. Schreckenberger, P. Schreiner, P. Shanahan. 2011-07-29. Improved search for muon-neutrino to electron-neutrino oscillations in MINOS. https://doi.org/10.1103/physrevlett.107.181802

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