Observation of Electron anti-neutrino Disappearance at Daya Bay

Yifang Wang (IHEP Beijing)
DESY Auditorium, 16.00 h

After eight years of planning and construction, the Daya Bay reactor neutrino experiment started physics data taking on Dec. 24, 2011. Over 55 days of data taking, first physics results are obtained. The disappearance of electron anti-neutrinos from reactors at a baseline of 1.7 km are observed, consistent with the expectation of the neutrino oscillation.
The measured oscillation amplitude is sin2 2theta_13 = 0.092 +- 0.016(stat) +- 0.005(syst), 5.2 sigma statistically significant from zero. A new plan for the future of the Daya bay experiment will also be given.

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