非表示:
キーワード:
High Energy Physics - Experiment, hep-ex, Physics, Instrumentation and Detectors, physics.ins-det
要旨:
The Double Chooz experiment has observed 8,249 candidate electron
antineutrino events in 227.93 live days with 33.71 GW-ton-years (reactor power
x detector mass x livetime) exposure using a 10.3 cubic meter fiducial volume
detector located at 1050 m from the reactor cores of the Chooz nuclear power
plant in France. The expectation in case of theta13 = 0 is 8,937 events. The
deficit is interpreted as evidence of electron antineutrino disappearance. From
a rate plus spectral shape analysis we find sin^2 2{\theta}13 = 0.109 \pm
0.030(stat) \pm 0.025(syst). The data exclude the no-oscillation hypothesis at
99.8% CL (2.9{\sigma}).