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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

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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.citation	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.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.subject	Física
dc.title	Evidence of electron neutrino appearance in a muon neutrino beam
dc.type	journal article	es_ES
dc.date.updated	2013-11-18T14:13:22Z
dc.identifier.doi	10.1103/PhysRevD.88.032002
dc.identifier.idgrec	091713
dc.rights.accessRights	open access	es_ES
dc.identifier.url	10.1103/PhysRevD.88.032002