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Título

Measurement of Neutrino Oscillation Parameters from Muon Neutrino Disappearance with an Off-Axis Beam

AutorT2K Collaboration; Abe, Kou; Cervera Villanueva, Anselmo ; Escudero Sánchez, Lorena ; Gómez Cadenas, Juan José ; Izmaylov, A. ; Monfregola, Laura ; Sorel, Michel ; Stamoulis, Panagiotis
Palabras claveDetector
Fecha de publicación19-nov-2013
EditorAmerican Physical Society
CitaciónPhysical Review Letters 111 (21): 211803 - 7 (2013)
ResumenThe T2K Collaboration reports a precision measurement of muon neutrino disappearance with an off-axis neutrino beam with a peak energy of 0.6 GeV. Near detector measurements are used to constrain the neutrino flux and cross section parameters. The Super-Kamiokande far detector, which is 295 km downstream of the neutrino production target, collected data corresponding to 3.01 x 10(20) protons on target. In the absence of neutrino oscillations, 205 +/- 17 (syst) events are expected to be detected while only 58 muon neutrino event candidates are observed. A fit to the neutrino rate and energy spectrum, assuming three neutrino flavors and normal mass hierarchy yields a best-fit mixing angle sin(2) (theta(23)) = 0.514 +/- 0.082 and mass splitting vertical bar Delta m(32)(2)vertical bar = 2.44(-0.15)(+0.17) x 10(-3) eV(2)/c(4). Our result corresponds to the maximal oscillation disappearance probability.
Versión del editorhttp://dx.doi.org/10.1103/PhysRevLett.111.211803
URIhttp://hdl.handle.net/10261/126582
DOI10.1103/PhysRevLett.111.211803
ISSN0031-9007
E-ISSN1079-7114
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