# First Measurement of theta_13 from Delayed Neutron Capture on Hydrogen in the Double Chooz Experiment

1 APC - Neutrinos
LPNHE - Laboratoire de Physique Nucléaire et de Hautes Énergies, APC (UMR_7164) - AstroParticule et Cosmologie
Abstract : The Double Chooz experiment has determined the value of the neutrino oscillation parameter $\theta_{13}$ from an analysis of inverse beta decay interactions with neutron capture on hydrogen. This analysis uses a three times larger fiducial volume than the standard Double Chooz assessment, which is restricted to a region doped with gadolinium (Gd), yielding an exposure of 113.1 GW-ton-years. The data sample used in this analysis is distinct from that of the Gd analysis, and the systematic uncertainties are also largely independent, with some exceptions, such as the reactor neutrino flux prediction. A combined rate- and energy-dependent fit finds $\sin^2 2\theta_{13}=0.097\pm 0.034(stat.) \pm 0.034 (syst.)$, excluding the no-oscillation hypothesis at 2.0 \sigma. This result is consistent with previous measurements of $\sin^2 2\theta_{13}$.
Document type :
Journal articles
Domain :

http://hal.in2p3.fr/in2p3-00776430
Contributor : Sylvie Flores Connect in order to contact the contributor
Submitted on : Tuesday, January 15, 2013 - 3:15:15 PM
Last modification on : Monday, December 13, 2021 - 9:15:27 AM

### Citation

Y. Abe, C. Aberle, J. C. Dos Anjos, J. C. Barriere, M. Bergevin, et al.. First Measurement of theta_13 from Delayed Neutron Capture on Hydrogen in the Double Chooz Experiment. Physics Letters B, Elsevier, 2013, 723, pp.66-70. ⟨10.1016/j.physletb.2013.04.050⟩. ⟨in2p3-00776430⟩

### Metrics

Les métriques sont temporairement indisponibles