DE KERRET, H.; ABRAHÃO, T.; ALMAZAN, H.; DOS ANJOS, J.C.; APPEL, S.; BEKMAN, I.; BEZERRA, T.J.C.; BEZRUKOV, L.; BLEURVACQ, N.; BLUCHER, E.; BRUGIÈRE, T.; BUCK, C.; BUSENITZ, J.; CABRERA, A.; CERRADA, M.; CHAUVEAU, E.; CHIMENTI, P.; DAWSON, J.V.; DJURCIC, Z.; ETENKO, A.; FURUTA, H.; GIL-BOTELLA, I.; GONZALEZ, L.F.G.; GOODMAN, M.C.; HARA, T.; HELLWIG, D.; HOURLIER, A.; ISHITSUKA, M.; JOCHUM, J.; JOLLET, C.; KALE, K.; KANEDA, M.; KAWASAKI, T.; KEMP, E.; KRYN, D.; KUZE, M.; LACHENMAIER, T.; LANE, C.E.; LASSERRE, T.; LASTORIA, C.; LHUILLIER, D.; LIMA, H.P.; LINDNER, M.; LÓPEZ-CASTAÑO, J.M.; LOSECCO, J.M.; LUBSANDORZHIEV, B.; MAEDA, J.; MARIANI, C.; MARICIC, J.; MARTINO, J.; MATSUBARA, T.; MENTION, G.; MEREGAGLIA, A.; MILETIC, T.; MILINCIC, R.; MINOTTI, A.; NAVAS-NICOLÁS, D.; NOVELLA, P.; OBERAUER, L.; OBOLENSKY, M.; ONILLON, A.; ORALBAEV, A.; PALOMARES, C.; PEPE, I.M.; PRONOST, G.; REICHENBACHER, J.; REINHOLD, B.; SETTIMO, M.; SCHÖNERT, S.; SCHOPPMANN, S.; SHARANKOVA, R.; SIBILLE, V.; SINEV, V.; SKOROKHVATOV, M.; SOLDIN, P.; STAHL, A.; STANCU, I.; STOKES, L.F.F.; SUEKANE, F.; SUKHOTIN, S.; SUMIYOSHI, T.; SUN, Y.; VIAUD, B.; VIVIER, M.; WAGNER, S.; WIEBUSCH, C.; YANG, G.; YERMIA, F.

doi:10.1038/s41567-020-0831-y

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DE KERRET, H.
AstroParticule et Cosmologie [APC (UMR_7164)]

ABRAHÃO, T.

ALMAZAN, H.

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Nature Phys.. 2020, vol. 16, n° 5, p. 558-564

Résumé en anglais

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 (ν1, ν2, ν3) are mixtures of their flavour eigenstates (νe, νμ, ντ). The oscillations between different flavour eigenstates are described by three mixing angles (θ12, θ23, θ13), two differences of the squared neutrino masses of the ν2/ν1 and ν3/ν1 pairs and a charge conjugation parity symmetry violating phase δCP. The Double Chooz experiment, located near the Chooz Electricité de France reactors, measures the oscillation parameter θ13 using reactor neutrinos. Here, the Double Chooz collaboration reports the measurement of the mixing angle θ13 with the new total neutron capture detection technique from the full data set, yielding sin2(2θ13) = 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 〈σf〉 = (5.71 ± 0.06) × 10−43 cm2 per fission, and reports an empirical model of the distortion in the reactor neutrino spectrum.< Réduire

Mots clés en anglais

neutrino: oscillation

neutrino: mixing angle

neutrino: mass difference

CP: violation

neutrino: nuclear reactor

neutrino: solar

neutrino: atmosphere

n: capture

Double Chooz

antineutrino

J-PARC Lab

KAMIOKANDE

Daya Bay

anomaly

precision measurement

RENO

experimental results

S067P13

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Double Chooz $\theta_{13}$ measurement via total neutron capture detection

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