1901.09445.pdf (1.25 MB)
Double Chooz ? 13 measurement via total neutron capture detection
journal contribution
posted on 2023-06-10, 01:45 authored by H de Kerret, T Abrahão, H Almazan, J C dos Anjos, S Appel, J C Barriere, I Bekman, Thiago Sogo BezerraThiago Sogo Bezerra, L Bezrukov, E Blucher, T Brugière, C Buck, J Busenitz, A Cabrera, M Cerrada, othersNeutrinos 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 (?1, ?2, ?3) are mixtures of their flavour eigenstates (?e, ?µ, ?t). The oscillations between different flavour eigenstates are described by three mixing angles (?12, ?23, ?13), two differences of the squared neutrino masses of the ?2/?1 and ?3/?1 pairs and a charge conjugation parity symmetry violating phase dCP. The Double Chooz experiment, located near the Chooz Electricité de France reactors, measures the oscillation parameter ?13 using reactor neutrinos. Here, the Double Chooz collaboration reports the measurement of the mixing angle ?13 with the new total neutron capture detection technique from the full data set, yielding sin2(2?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 = (5.71 ± 0.06) × 10-43 cm2 per fission, and reports an empirical model of the distortion in the reactor neutrino spectrum.
History
Publication status
- Published
File Version
- Accepted version
Journal
Nature PhysicsISSN
1745-2473Publisher
SpringerExternal DOI
Issue
5Volume
16Page range
558-564Department affiliated with
- Physics and Astronomy Publications
Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2021-11-15First Open Access (FOA) Date
2021-11-19First Compliant Deposit (FCD) Date
2021-11-12Usage metrics
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