Particle Physics Seminar

"Observation of the last, weakest neutrino transformation at RENO"

Presented by Soo-Bong Kim, Seoul National University

Friday, April 13, 2012, 11:00 am — Small Seminar Room, Bldg. 510

The RENO experiment has observed the disappearance of reactor electron antineutrinos, consistent with neutrino oscillations, with a significance of 6.3 standard deviations. Antineutrinos from six reactors at Yonggwang Nuclear Power Plant in Korea, are detected by two identical detectors located at 294 m and 1383 m, respectively, from the reactor array center. In the 229 day data-taking period of 11 August 2011 to 26 March 2012, the far (near) detector observed 17102 (154088) electron antineutrino candidate events with a background fraction of 4.9% (2.7%). A ratio of observed to expected number of antineutrinos in the far detector is 0.922+-0.010(stat.)+-0.008(syst.). From the deficit, we find sin^2(2theta_13)=0.103+-0.013(stat.)+-0.011(syst,) based on a rate-only analysis. In this talk, its detailed analysis will be presented.

Hosted by: Milind Diwan

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