The Double Chooz experiment has determined the value of the neutrino oscillation parameter θ13 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 sin22θ13=0.097±0.034 (stat.)±0.034 (syst.), excluding the no-oscillation hypothesis at 2.0. This result is consistent with previous measurements of sin22θ13.
|Original language||English (US)|
|Number of pages||5|
|Journal||Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics|
|State||Published - Jun 10 2013|
Bibliographical noteFunding Information:
We thank the French electricity company EDF; the European fund FEDER; the Région de Champagne Ardenne; the Département des Ardennes; and the Communauté des Communes Ardennes Rives de Meuse. We acknowledge the support of the CEA , CNRS/IN2P3 , the computer center CCIN2P3 , and LabEx UnivEarthS in France ; the Ministry of Education, Culture, Sports, Science and Technology of Japan (MEXT) and the Japan Society for the Promotion of Science (JSPS) ; the Department of Energy and the National Science Foundation of the United States ; the Ministerio de Ciencia e Innovación (MICINN) of Spain ; the Max Planck Gesellschaft , and the Deutsche Forschungsgemeinschaft DFG ( SBH WI 2152 ), the Transregional Collaborative Research Center TR27 , the excellence cluster “Origin and Structure of the Universe” , and the Maier-Leibnitz-Laboratorium Garching in Germany ; the Russian Academy of Science , the Kurchatov Institute and RFBR (the Russian Foundation for Basic Research) ; the Brazilian Ministry of Science , Technology and Innovation (MCTI) , the Financiadora de Estudos e Projetos (FINEP) , the Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) , the São Paulo Research Foundation (FAPESP) , and the Brazilian Network for High Energy Physics (RENAFAE) in Brazil .