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Author (up) Double Chooz collaboration (de Kerret, H. et al); Novella, P.
Title Double Chooz theta(13) measurement via total neutron capture detection Type Journal Article
Year 2020 Publication Nature Physics Abbreviated Journal Nat. Phys.
Volume 16 Issue Pages 558-564
Keywords
Abstract Neutrinos were assumed to be massless particles until the discovery of the neutrino oscillation process. This phenomenon indicates that the neutrinos have non-zero masses and the mass eigenstates (nu(1), nu(2), nu(3)) are mixtures of their flavour eigenstates (nu(e), nu(mu), nu(tau)). The oscillations between different flavour eigenstates are described by three mixing angles (theta(12), theta(23), theta(13)), two differences of the squared neutrino masses of the nu(2)/nu(1) and nu(3)/nu(1) pairs and a charge conjugation parity symmetry violating phase delta(CP). The Double Chooz experiment, located near the Chooz Electricite de France reactors, measures the oscillation parameter theta(13) using reactor neutrinos. Here, the Double Chooz collaboration reports the measurement of the mixing angle theta(13) with the new total neutron capture detection technique from the full data set, yielding sin(2)(2 theta(13)) = 0.105 +/- 0.014. This measurement exploits the multidetector configuration, the isoflux baseline and data recorded when the reactors were switched off. In addition to the neutrino mixing angle measurement, Double Chooz provides a precise measurement of the reactor neutrino flux, given by the mean cross-section per fission <sigma(f)& rang; = (5.71 +/- 0.06) x 10(-43) cm(2) per fission, and reports an empirical model of the distortion in the reactor neutrino spectrum. The Double Chooz collaboration reports the neutrino oscillation parameter theta(13) from a measurement of the disappearance of reactor anti-electron neutrinos with the total neutron capture technique.
Address [de Kerret, H.; Cabrera, A.; Dawson, J., V; Givaudan, A.; Gomez, H.; Hourlier, A.; Karakac, M.; Kryn, D.; Lasserres, T.; Obolensky, M.; Onillon, A.; Suekane, F.; Wagner, S.] Sorbonne Paris Cite Univ, Observ Paris, CEA IRFU, APC,CNRS IN2P3, Paris, France, Email: christian.buck@mpi-hd.mpg.de;
Corporate Author Thesis
Publisher Nature Publishing Group Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 1745-2473 ISBN Medium
Area Expedition Conference
Notes WOS:000528019800001 Approved no
Is ISI yes International Collaboration yes
Call Number IFIC @ pastor @ Serial 4389
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