AI Article Synopsis
- The Sudbury Neutrino Observatory (SNO) used 3He proportional counters to measure neutral-current interactions in heavy water, determining the total active 8B solar neutrino flux with a new method.
- The measured total flux was found to be 5.54 with specific uncertainties, consistent with earlier findings and standard solar models.
- A comprehensive analysis of solar and reactor neutrino data suggested a new value for Deltam2 and improved precision in the mixing angle theta compared to earlier SNO results.
Article Abstract
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_-0.31;+0.33(stat)-0.34+0.36(syst)x10(6) cm(-2) s(-1), in agreement with previous measurements and standard solar models. A global analysis of solar and reactor neutrino results yields Deltam2=7.59_-0.21;+0.19x10(-5) eV2 and theta=34.4_-1.2;+1.3 degrees. The uncertainty on the mixing angle has been reduced from SNO's previous results.
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| http://dx.doi.org/10.1103/PhysRevLett.101.111301 | DOI Listing |
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