{"paper":{"title":"First direct observation of muon antineutrino disappearance","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"A. Blake, A. Habig, A. Himmel, A. Holin, A. Kreymer, A. M. McGowan, A. Sousa, A. Weber, B. C. Choudhary, B. Rebel, B. Viren, C. Andreopoulos, C. Backhouse, C. D. Moore, C. Howcroft, C. James, C. O. Escobar, C. Rosenfeld, C. White, D. A. Petyt, D. Bogert, D. Cherdack, D. Cronin-Hennessy, D. E. Jaffe, D. Harris, D. J. Auty, D. J. Boehnlein, D. Jensen, D. Naples, D. S. Ayres, E. Falk, E. Tetteh-Lartey, G. Barr, G. F. Pearce, G. J. Bock, G. J. Feldman, G. Koizumi, G. Lefeuvre, G. M. Irwin, G. Pawloski, G. Tinti, G. Tzanakos, H. A. Rubin, H. B. Newman, H. R. Gallagher, I. Z. Danko, J. A. B. Coelho, J. A. Nowak, J. Hartnell, J. Hylen, J. Ilic, J. J. Evans, J. K. de Jong, J. K. Nelson, J. Ling, J. Mitchell, J. Morf\\'in, J. Musser, J. Paley, J. P. Ochoa-Ricoux, J. Ratchford, J. R. Meier, J. Schneps, J. Thomas, J. Urheim, K. Grzelak, K. Lang, L. Corwin, L. Loiacono, L. Mualem, L. Whitehead, M. A. Thomson, M. Bishai, M. C. Goodman, M. C. Sanchez, M. D. Messier, M. Dorman, MINOS Collaboration: P. Adamson, M. Kordosky, M. L. Marshak, M. Orchanian, M. Strait, M. V. Diwan, M. V. Frohne, N. E. Devenish, N. Graf, N. Grant, N. Mayer, N. Tagg, P. A. Rodrigues, P. Gouffon, P. J. Litchfield, P. Lucas, P. Schreiner, P. Shanahan, P. Stamoulis, P. Vahle, R. A. Gomes, R. B. Patterson, R. C. Webb, R. Gran, R. Hatcher, R. J. Nichol, R. K. Plunkett, R. L. Talaga, R. Mehdiyev, R. Ospanov, R. Toner, R. Zwaska, S. Cavanaugh, S. Childress, S. G. Wojcicki, S. J. Coleman, S. Kopp, S. M. S. Kasahara, S. Mufson, S. Phan-Budd, S. R. Mishra, T. C. Nicholls, T. Kafka, T. M. Raufer, T. Yang, W. A. Mann, W. H. Miller, W. P. Oliver, X. Huang, X. Qiu, Z. Isvan","submitted_at":"2011-04-03T00:17:10Z","abstract_excerpt":"This letter reports the first direct observation of muon antineutrino disappearance. The MINOS experiment has taken data with an accelerator beam optimized for muon antineutrino production, accumulating an exposure of $1.71\\times 10^{20}$ protons on target. In the Far Detector, 97 charged current muon antineutrino events are observed. The no-oscillation hypothesis predicts 156 events and is excluded at $6.3\\sigma$. The best fit to oscillation yields $\\Delta \\bar{m}^{2}=(3.36^{+0.46}_{-0.40}\\textrm{(stat.)}\\pm0.06\\textrm{(syst.)})\\times 10^{-3}\\,\\eV^{2}$, $\\sin^{2}(2\\bar{\\theta})=0.86^{+0.11}_{"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1104.0344","kind":"arxiv","version":4},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}