The MINOS experiment has been designed to measure with high precision the neutrino oscillation parameters associated with the behaviour of in the atmospheric neutrino oscillation sector. This article details the design of the detector and the measurement of the survival probability as a function of energy after the neutrinos have travelled 735 km. Based on an exposure of 2.5 × 1020 protons on target, an updated, though preliminary, analysis is described here, in which 563 CC events have been observed with an expectation of 738.0 ± 30.0 (stat + syst) events. The energy dependence of the survival probability is consistent with the two-flavour neutrino oscillation hypothesis with [image omitted] and sin2(223) > 0.84 (90% C.L.).
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Document Type: Research Article
Affiliations: Physics and Astronomy Department, University College London, London, UK
Publication date: 2007-07-01