Measurement of the neutrino-oxygen neutral-current interaction cross section by observing nuclear deexcitation gamma rays
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Measurement of the neutrino-oxygen neutral-current interaction cross section by observing nuclear deexcitation gamma rays

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Measurement of the neutrino-oxygen neutral-current interaction cross section by observing nuclear deexcitation gamma rays

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dc.contributor.author T2K Collaboration
dc.contributor.author Abe, K.
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.date.accessioned 2015-12-17T11:52:48Z
dc.date.available 2015-12-17T11:52:48Z
dc.date.issued 2014
dc.identifier.uri http://hdl.handle.net/10550/49583
dc.description.abstract We report the first measurement of the neutrino-oxygen neutral-current quasielastic (NCQE) cross section gamma It is obtained by observing nuclear deexcitation. rays which follow neutrino-oxygen interactions at the Super-Kamiokande water Cherenkov detector. We use T2K data corresponding to 3.01 x 10(20) protons on target. By selecting only events during the T2K beam window and with well-reconstructed vertices in the fiducial volume, the large background rate from natural radioactivity is dramatically reduced. We observe 43 events in the 4-30 MeV reconstructed energy window, compared with an expectation of 51.0, which includes an estimated 16.2 background events. The background is primarily nonquasielastic neutral-current interactions and has only 1.2 events from natural radioactivity. The flux-averaged NCQE cross section we measure is 1.55 x 10(-38) cm(2) with a 68% confidence interval of (1.22, 2.20) x 10(-38) cm(2) at a median neutrino energy of 630 MeV, compared with the theoretical prediction of 2.01 x 10(-38) cm(2).
dc.language.iso eng
dc.relation.ispartof Physical Review D, 2014, vol. 90, num. 7, p. 072012-1-072012-11
dc.rights.uri info:eu-repo/semantics/openAccess
dc.source T2K Collaboration Abe, K. Cervera Villanueva, Anselmo Escudero Sánchez, Lorena Gómez Cadenas, Juan José Izmaylov, Alexander Monfregola, Laura Sorel, Michel Stamoulis, Panagiotis 2014 Measurement of the neutrino-oxygen neutral-current interaction cross section by observing nuclear deexcitation gamma rays Physical Review D 90 7 072012-1 072012-11
dc.subject Física
dc.title Measurement of the neutrino-oxygen neutral-current interaction cross section by observing nuclear deexcitation gamma rays
dc.type info:eu-repo/semantics/article
dc.date.updated 2015-12-17T11:52:48Z
dc.identifier.doi http://dx.doi.org/10.1103/PhysRevD.90.072012
dc.identifier.idgrec 100876

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