Abstrakt
The Daya Bay reactor neutrino experiment has been designed to precisely measure the least known neutrino mixing angle theta(13). In March 2012, Daya Bay collaboration announced [1] the observation of non-zero value of sin(2) 2 theta(13).
Because of large statistics of detected antineutrinos and excellent performance of the experiment, Daya Bay continuously improves the precision of world best measurement of sin(2) 2 theta(13). In addition it provides results on neutrino mass splitting Delta m(ee)(2) competitive with measurements of other experiments, results on precise measurement of reactor fluxes and on limits of the existence of hypothetical fourth neutrino.
In this paper, we report the results available by the time of the 6th Capri workshop: the measurement of oscillation parameters sin(2) (2 theta(13)) = 0.084 +/- 0.005 and vertical bar Delta m(ee)(2)vertical bar = (2.42 +/- 0.11) x 10(-3) eV (2) [2], searches for sterile neutrinos [3] and precise measurement of reactor neutrino flux [4]. These are based on 621 days of measurement, most of the data has been taken in full detector configuration.
More precise results [5] with 1230 days of operation have been presented few weeks later at the Neutrino 2016 conference.