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Evidence of electron neutrino appearance in a muon neutrino beam

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Evidence of electron neutrino appearance in a muon neutrino beam

dc.contributor.author	Cervera Villanueva, Anselmo
dc.contributor.author	Escudero Sánchez, Lorena
dc.contributor.author	Gómez Cadenas, Juan José
dc.contributor.author	Izmaylov, Alexander
dc.contributor.author	Monfregola, Laura
dc.contributor.author	Sorel, Michel
dc.contributor.author	Stamoulis, Panagiotis
dc.contributor.author	T2K Collaboration
dc.date.accessioned	2013-11-18T14:13:22Z
dc.date.available	2013-11-18T14:13:22Z
dc.date.issued	2013
dc.identifier.uri	http://dx.doi.org/10.1103/PhysRevD.88.032002
dc.identifier.uri	http://hdl.handle.net/10550/31127
dc.description.abstract	The T2K Collaboration reports evidence for electron neutrino appearance at the atmospheric mass splitting, vertical bar Delta m(32)(2)vertical bar approximate to 2.4 X 10(-3) eV(2). An excess of electron neutrino interactions over background is observed from a muon neutrino beam with a peak energy of 0.6 GeV at the Super-Kamiokande (SK) detector 295 km from the beam's origin. Signal and background predictions are constrained by data from near detectors located 280 m from the neutrino production target. We observe 11 electron neutrino candidate events at the SK detector when a background of 3.3 +/- 0.4(syst) events is expected. The background-only hypothesis is rejected with a p value of 0.0009 (3.1 sigma), and a fit assuming nu(mu) -> nu(e) oscillations with sin (2)2 theta(23) = 1, delta(CP) = 0 and vertical bar Delta m(32)(2)vertical bar = 2.4 X 10(-3) eV(2) yields sin (2)2 theta(13) = 0.088(-0.039)(+0.049)(stat + syst).
dc.relation.ispartof	Physical Review D, 2013, vol. 88, num. 3, p. 032002-1-032002-41
dc.rights.uri	info:eu-repo/semantics/openAccess
dc.source	Cervera Villanueva, Anselmo Escudero, L. Gómez Cadenas, Juan José Izmaylov, Alexander Monfregola, L. Sorel, Michel Stamoulis, Panagiotis 2013 Evidence of electron neutrino appearance in a muon neutrino beam Physical Review D 88 3 032002-1 032002-41
dc.subject	Física
dc.title	Evidence of electron neutrino appearance in a muon neutrino beam
dc.type	info:eu-repo/semantics/article
dc.date.updated	2013-11-18T14:13:22Z
dc.identifier.doi	http://dx.doi.org/10.1103/PhysRevD.88.032002
dc.identifier.idgrec	091713