Improved measurement of muon antineutrino disappearance in MINOS

Devenish, N E, Falk, E, Hartnell, J and The MINOS Collaboration, (2012) Improved measurement of muon antineutrino disappearance in MINOS. Physical Review Letters, 108. pp. 191801-1. ISSN 0031-9007

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Abstract

We report an improved measurement of ν̅ μ disappearance over a distance of 735 km using the MINOS detectors and the Fermilab Main Injector neutrino beam in a ν̅ 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 Δm̅ 2=[2.62-0.28+0.31(stat)±0.09(syst)]×10-3  eV2 and constrain the ν̅ μ mixing angle sin⁡2(2θ̅ )>0.75 (90% C.L.). These values are in agreement with Δm2 and sin⁡2(2θ) measured for νμ, removing the tension reported in [ P. Adamson et al. Phys. Rev. Lett. 107 021801 (2011)].

Item Type: Article
Additional Information: 3%: Estimated Sussex share of journal costs
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Subjects: Q Science > QC Physics > QC0770 Nuclear and particle physics. Atomic energy. Radioactivity > QC0793 Elementary particle physics
Depositing User: Jeff Hartnell
Date Deposited: 23 May 2013 07:29
Last Modified: 07 Mar 2017 05:49
URI: http://sro.sussex.ac.uk/id/eprint/44884

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