No abstract

We report on νe andνe appearance in νµ andνµ beams using the full MINOS data sample. The comparison of these νe andνe appearance data at a 735 km baseline with θ13 measurements by reactor experiments probes δ, the θ23 octant degeneracy, and the mass hierarchy. This analysis is the first use of this technique and includes the first accelerator long-baseline search forνµ →νe. Our data disfavor 31% (5%) of the three-parameter space defined by δ, the octant of the θ23, and the mass hierarchy at the 68% (90%) C.L. We measure a value of 2sin 2 (2θ13)sin 2 (θ23) that is consistent with reactor experiments. 2PACS numbers: 14.60. Pq, 14.60.Lm, The neutrino oscillation phenomenon is successfully modeled by a theory of massive neutrino eigenstates that are different from the neutrino flavor eigenstates. These sets of eigenstates are related by the PMNS matrix [1] which is commonly parameterized by three angles, θ ij , and a CP-violating phase, δ.The values of θ 12 and θ 23 have been measured [2-4] with indications that θ 23 is not maximal [5][6][7]. The final angle, θ 13 , is now known to have a nonzero value from measurements by reactor experiments [8][9][10], the measurement by the T2K [11] accelerator experiment, and from earlier MINOS results [12,13].Despite these accomplishments, the value of δ is still unknown, as is the ordering of the neutrino masses, which is referred to as the neutrino mass hierarchy. Much of the attention in the neutrino community is now focused on resolving these unknowns. The mass hierarchy is not only a fundamental property of neutrinos but also has a direct impact on the ability of neutrinoless double beta decay searches to state definitively whether the neutrino is its own antiparticle [14]. Reactor experiments make a pure measurement of θ 13 , whereas the ν µ → ν e and ν µ →ν e appearance probabilities measured by accelerator experiments such as MINOS depend on the value of δ and sin 2 (θ 23 ). In addition, the long-baseline of MI-NOS means that interactions between neutrinos and the matter of the Earth make the appearance probabilities dependent on the neutrino mass hierarchy [15,16].We report the result from the search for ν e (ν e ) appearance in a ν µ (ν µ ) beam using the full MINOS data sample. This result uses an exposure of 10.6 × 10 20 protons-ontarget taken with a ν beam and an exposure of 3.3 × 10 20 protons-on-target taken with aν beam. The neutrino sample is 30% larger than the sample used for the previous MINOS results on this topic [13]. This analysis represents the first long-baseline search forν µ →ν e appearance and places new constraints on θ 13 and on a combination of δ, θ 23 , and the neutrino mass hierarchy.In the MINOS experiment [17], neutrino oscillation is studied with the NuMI beamline [18] by measuring neutrino interactions in two detectors. The Near Detector (ND), which has a fiducial mass of 29 tons, is at a distance of 1.04 km from the production target and is used to determine the composition of the beam before the neutrinos have oscillated. The Far Detector...

This paper describes the hardware and operations of the Neutrinos at the Main Injector (NuMI) beam at Fermilab. It elaborates on the design considerations for the beam as a whole and for individual elements. The most important design details of individual components are described. Beam monitoring systems and procedures, including the tuning and alignment of the beam and NuMI longterm performance, are also discussed.

Combined analysis of µ disappearance and µ e ν ν → ν appearance in MINOS using accelerator and atmospheric neutrinos Article (Published Version) http://sro.sussex.ac.uk Devenish, N E, Falk, E, Hartnell, J and The MINOS Collaboration, et al (2014) Combined analysis of νμ disappearance and νμ → νe appearance in MINOS using accelerator and atmospheric neutrinos. Physical Review Letters (PRL), 112 (19). This version is available from Sussex Research Online: http://sro.sussex.ac.uk/70068/ This document is made available in accordance with publisher policies and may differ from the published version or from the version of record. If you wish to cite this item you are advised to consult the publisher's version. Please see the URL above for details on accessing the published version. Copyright and reuse:Sussex Research Online is a digital repository of the research output of the University.Copyright and all moral rights to the version of the paper presented here belong to the individual author(s) and/or other copyright owners. To the extent reasonable and practicable, the material made available in SRO has been checked for eligibility before being made available.Copies of full text items generally can be reproduced, displayed or performed and given to third parties in any format or medium for personal research or study, educational, or not-for-profit purposes without prior permission or charge, provided that the authors, title and full bibliographic details are credited, a hyperlink and/or URL is given for the original metadata page and the content is not changed in any way. We report on a new analysis of neutrino oscillations in MINOS using the complete set of accelerator and atmospheric data. The analysis combines the ν μ disappearance and ν e appearance data using the three-flavor PRL 112, 191801 (2014) PHYSICAL REVIEW LETTERS week ending

No abstract