Search for Sterile Neutrinos Mixing with Muon Neutrinos in MINOS.

Adamson P,Anghel I,Aurisano A, Barr G,Bishai M, Blake A,Bock G J,Bogert D,Cao S V,Carroll T J,Castromonte C M,Chen R,Childress S,Coelho J A B,Corwin L,Cronin-Hennessy D,de Jong J K,De Rijck S,Devan A V,Devenish N E,Diwan M V, Escobar C O,Evans J J,Falk E,Feldman G J,Flanagan W,Frohne M V,Gabrielyan M,Gallagher H R,Germani S,Gomes R A,Goodman M C,Gouffon P,Graf N,Gran R,Grzelak K,Habig A,Hahn S R,Hartnell J,Hatcher R,Holin A,Huang J,Hylen J,Irwin G M,Isvan Z,James C,Jensen D,Kafka T,Kasahara S M S,Koizumi G,Kordosky M,Kreymer A,Lang K,Ling J,Litchfield P J,Lucas P, Mann W A,Marshak M L,Mayer N,McGivern C,Medeiros M M,Mehdiyev R,Meier J R,Messier M D,Miller W H,Mishra S R,Moed Sher S,Moore C D,Mualem L,Musser J,Naples D,Nelson J K, Newman H B,Nichol R J,Nowak J A,O'Connor J,Orchanian M,Pahlka R B, Paley J,Patterson R B,Pawloski G,Perch A, Pfützner M M,Phan D D,Phan-Budd S,Plunkett R K,Poonthottathil N,Qiu X,Radovic A,Rebel B,Rosenfeld C,Rubin H A,Sail P,Sanchez M C, Schneps J,Schreckenberger A,Schreiner P,Sharma R,Sousa A,Tagg N,Talaga R L,Thomas J,Thomson M A,Tian X,Timmons A,Todd J,Tognini S C,Toner R,Torretta D,Tzanakos G,Urheim J,Vahle P,Viren B,Weber A,Webb R C, White C,Whitehead L,Whitehead L H,Wojcicki S G,Zwaska R, Null Null

PHYSICAL REVIEW LETTERS（2016）

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摘要

We report results of a search for oscillations involving a light sterile neutrino over distances of 1.04 and 735 km in a nu(mu)-dominated beam with a peak energy of 3 GeV. The data, from an exposure of 10.56 x 10(20) protons on target, are analyzed using a phenomenological model with one sterile neutrino. We constrain the mixing parameters theta(24) and Delta m(41)(2) and set limits on parameters of the four-dimensional Pontecorvo-Maki-Nakagawa-Sakata matrix, vertical bar U-mu 4 vertical bar(2) and vertical bar U-tau 4 vertical bar(2), under the assumption that mixing between nu(e) and nu(s) is negligible (vertical bar U-e4 vertical bar(2) = 0). No evidence for nu(mu) -> nu(s) transitions is found and we set a world-leading limit on theta(24) for values of Delta m(41)(2) less than or similar to 1 eV(2).

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