Physics – Nuclear Physics – Nuclear Experiment
Scientific paper
2008-06-05
Phys.Rev.Lett.101:111301,2008
Physics
Nuclear Physics
Nuclear Experiment
5 pages, 2 figures, version accepted by Phys Rev Lett, added latest KamLAND 2881 ton-year data and 192 day Borexino data
Scientific paper
10.1103/PhysRevLett.101.111301
The Sudbury Neutrino Observatory (SNO) used an array of 3He proportional counters to measure the rate of neutral-current interactions in heavy water and precisely determined the total active (nu_x) 8B solar neutrino flux. This technique is independent of previous methods employed by SNO. The total flux is found to be 5.54(+0.33/-0.31 stat, +0.36/-0.34 syst) x 10^6 cm^-2 s^-1, in agreement with previous measurements and standard solar models. A global analysis of solar and reactor neutrino results yields Delta m^2 = 7.59(+0.19/-0.21) x 10^-5 eV^2 and theta = 34.4(+1.3/-1.2) degrees. The uncertainty on the mixing angle has been reduced from SNO's previous results.
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