标题：Independent measurement of the neutrino mixing angle θ13 via neutron capture on hydrogen at Daya Bay
作者：An F.P.; Balantekin A.B.; Band H.R.; Beriguete W.; Bishai M.; Blyth S.; Butorov I.; Cao G.F.;等 更多 作者机构：[An, F.P] Institute of Modern Physics, East China University of Science and Technology, Shanghai, China;[ Balantekin, A.B] University of Wisconsin, Ma 更多
通讯作者地址：[An, F.P] Institute of Modern Physics, East China University of Science and TechnologyChina
来源：Physical Review D - Particles, Fields, Gravitation and Cosmology
摘要：A new measurement of the θ13 mixing angle has been obtained at the Daya Bay Reactor Neutrino Experiment via the detection of inverse beta decays tagged by neutron capture on hydrogen. The antineutrino events for hydrogen capture are distinct from those for gadolinium capture with largely different systematic uncertainties, allowing a determination independent of the gadolinium-capture result and an improvement on the precision of the θ13 measurement. With a 217-day antineutrino data set obtained with six antineutrino detectors and from six 2.9GWth reactors, the rate deficit observed at the far hall is interpreted as sin22θ13=0.083±0.018 in the three-flavor oscillation model. When combined with the gadolinium-capture result from Daya Bay, we obtain sin22θ13=0.089±0.008 as the final result for the six-antineutrino-detector configuration of the Daya Bay experiment. © 2014 American Physical Society.