Measurement of the Total Active 8B Solar Neutrino Flux at the Sudbury Neutrino Observatory with Enhanced Neutral Current Sensitivity

2003/09/06 by SNO Collaboration, S. N. Ahmed, A. E. Anthony +98 · 66 citations
Physics and Astronomy · #Astrophysics and Cosmic Phenomena #Neutrino Physics Research #Particle physics theoretical and experimental studies #hep-ex #nucl-ex

paper · pdf · doi:10.1103/physrevlett.92.181301

published as Phys.Rev.Lett.92:181301,2004 · Submitted to Phys. Rev. Lett

arxiv created 2003/09/06 · openalex publication_date 2004/05/03 · arxiv updated 2012/08/27 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/01

Abstract

The Sudbury Neutrino Observatory (SNO) has precisely determined the total active (nu_x) 8B solar neutrino flux without assumptions about the energy dependence of the nu_e survival probability. The measurements were made with dissolved NaCl in the heavy water to enhance the sensitivity and signature for neutral-current interactions. The flux is found to be 5.21 +/- 0.27 (stat) +/- 0.38 (syst) x10⁶ cm^-2s^-1, in agreement with previous measurements and standard solar models. A global analysis of these and other solar and reactor neutrino results yields Delta m² = 7.1^+1.2_-0.6x10^-5 ev² and theta = 32.5^+2.4_-2.3 degrees. Maximal mixing is rejected at the equivalent of 5.4 standard deviations.

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