Adamson, P.Ayres, D. S.Backhouse, C.Barr, G.Bishai, M.Blake, A.Bock, G. J.Boehnlein, D. J.Bogert, D.Cao, S. V.Childress, S.Coelho, J. A. B.Corwin, L.Cronin-Hennessy, D.Danko, I. Z.de Jong, J. K.Devenish, N. E.Diwan, M. V.Escobar, C. O.Evans, J. J.Falk, E.Feldman, GaryFrohne, M. V.Gallagher, H. R.Gomes, R. A.Goodman, M. C.Gouffon, P.Graf, N.Gran, R.Grzelak, K.Habig, A.Hartnell, J.Hatcher, R.Himmel, A.Holin, A.Huang, X.Hylen, J.Irwin, G. M.Isvan, Z.Jaffe, D. E.James, C.Jensen, D.Kafka, T.Kasahara, S. M. S.Koizumi, G.Kopp, S.Kordosky, M.Kreymer, A.Lang, K.Ling, J.Litchfield, P. J.Loiacono, L.Lucas, P.Mann, W. A.Marshak, M. L.Mathis, M.Mayer, N.Mehdiyev, R.Meier, J. R.Messier, M. D.Michael, D. G.Miller, W. H.Mishra, S. R.Mitchell, J.Moore, C. D.Mualem, L.Mufson, S.Musser, J.Naples, D.Nelson, J. K.Newman, H. B.Nichol, R. J.Nowak, J. A.Oliver, W. P.Orchanian, M.Pahlka, R. B.Paley, J.Patterson, R. B.Pawloski, G.Phan-Budd, S.Plunkett, R. K.Qiu, X.Radovic, A.Ratchford, J.Rebel, B.Rosenfeld, C.Rubin, H. A.Sanchez, M. C.Schneps, J.Schreckenberger, A.Schreiner, P.Sharma, R.Sousa, A.Strait, M.Tagg, N.Talaga, R. L.Thomas, J.Thomson, M. A.Tinti, G.Toner, R.Torretta, D.Tzanakos, G.Urheim, J.Vahle, P.Viren, B.Walding, J. J.Weber, A.Webb, R. C.White, C.Whitehead, L.Wojcicki, S. G.Zwaska, R.2014-03-062012Adamson, P., D. S. Ayres, C. Backhouse, G. Barr, M. Bishai, A. Blake, G. J. Bock, et al. 2012. Improved Measurement of Muon Antineutrino Disappearance in MINOS. Physical Review Letters 108, no. 19: 191801.0031-9007http://nrs.harvard.edu/urn-3:HUL.InstRepos:11870348We report an improved measurement of ν̅μ disappearance over a distance of 735 km using the MINOS detectors and the Fermilab Main Injector neutrino beam in a ν̅μ-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 Δm̅2=[2.62+0.31−0.28(stat)±0.09(syst)]×10−3 eV2 and constrain the ν̅μ mixing angle sin2(2θ̅)>0.75 (90% C.L.). These values are in agreement with Δm2 and sin2(2θ) measured for νμ, removing the tension reported in [P. Adamson et al. (MINOS), Phys. Rev. Lett. 107, 021801 (2011).].en-USJournal Article2014-02-18P. Adamson et al2014-03-0610.1103/PhysRevLett.108.191801