Document Type
Article
Department/Program
Physics
Journal Title
Physical Review Letters
Pub Date
2012
Volume
108
Issue
19
Abstract
We report an improved measurement of (nu) over bar (mu) disappearance over a distance of 735 km using the MINOS detectors and the Fermilab Main Injector neutrino beam in a (nu) over bar (mu)-enhanced configuration. From a total exposure of 2.95 x 10(20) protons on target, of which 42% have not been previously analyzed, we make the most precise measurement of Delta(m) over bar (2) = [2.62(-0.28)(+0.31)(stat) +/- 0.09(syst)] x 10(-3) eV(2) and constrain the (nu) over bar (mu) mixing angle sin(2)(2 (theta) over bar) > 0.75 (90% C.L.). These values are in agreement with Delta m(2) and sin(2)(2 theta) measured for nu(mu), removing the tension reported in [P. Adamson et al. (MINOS), Phys. Rev. Lett. 107, 021801 (2011).].
Recommended Citation
Adamson, P.; Bock, G. J.; Boehnlein, D. J.; Kordosky, M.; Mathis, M.; Nelson, J. K.; Vahle, P.; and Walding, J. J., Improved Measurement of Muon Antineutrino Disappearance in MINOS (2012). Physical Review Letters, 108(19).
10.1103/PhysRevLett.108.191801
DOI
10.1103/PhysRevLett.108.191801
