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Precise Measurement of the Neutrino Mixing Parameter theta(23) from Muon Neutrino Disappearance in an Off-Axis Beam

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Precise Measurement of the Neutrino Mixing Parameter theta(23) from Muon Neutrino Disappearance in an Off-Axis Beam

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dc.contributor.author	Cervera Villanueva, Anselmo
dc.contributor.author	Escudero Sánchez, Lorena
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	2014-10-14T11:15:47Z
dc.date.available	2014-10-14T11:15:47Z
dc.date.issued	2014
dc.identifier.citation	Cervera Villanueva, Anselmo Escudero Sánchez, Lorena Izmaylov, Alexander Monfregola, Laura Sorel, Michel Stamoulis, Panagiotis 2014 Precise Measurement of the Neutrino Mixing Parameter theta(23) from Muon Neutrino Disappearance in an Off-Axis Beam Physical Review Letters 112 18 181801
dc.identifier.uri	http://hdl.handle.net/10550/39170
dc.description.abstract	New data from the T2K neutrino oscillation experiment produce the most precise measurement of the neutrino mixing parameter theta(23). Using an off-axis neutrino beam with a peak energy of 0.6 GeV and a data set corresponding to 6.57 x 10(20) protons on target, T2K has fit the energy-dependent nu(mu) oscillation probability to determine oscillation parameters. The 68% confidence limit on sin(2)(theta(23)) is 0.514(-0.056)(+0.055) (0.511 +/- 0.055), assuming normal (inverted) mass hierarchy. The best-fit mass-squared splitting for normal hierarchy is Delta m(32)(2) = (2.51 +/- 0.10) x 10(-3) eV(2)/c(4) (inverted hierarchy: Delta m(13)(2) = (2.48 +/- 0.10) x 10(-3) eV(2)/c(4)). Adding a model of multinucleon interactions that affect neutrino energy reconstruction is found to produce only small biases in neutrino oscillation parameter extraction at current levels of statistical uncertainty.
dc.language.iso	eng
dc.relation.ispartof	Physical Review Letters, 2014, vol. 112, num. 18, p. 181801
dc.subject	Física
dc.title	Precise Measurement of the Neutrino Mixing Parameter theta(23) from Muon Neutrino Disappearance in an Off-Axis Beam
dc.type	journal article	es_ES
dc.date.updated	2014-10-14T11:15:48Z
dc.identifier.doi	10.1103/PhysRevLett.112.181801
dc.identifier.idgrec	099120
dc.rights.accessRights	open access	es_ES