${}^{7}\mathrm {Be}$ solar-neutrino flux measured via ${{\mathit \nu}_{{{e}}}}$ elastic scattering. This process is sensitive to all active neutrino flavors, but with reduced sensitivity to ${{\mathit \nu}_{{{\mu}}}}$, ${{\mathit \nu}_{{{\tau}}}}$ due to the cross-section difference, $\sigma\mathrm {( {{\mathit \nu}} _{{{\mathit \mu}}, {{\mathit \tau}}} {{\mathit e}} )}$ $\sim{}0.2$ $\sigma\mathrm {( {{\mathit \nu}_{{{e}}}} {{\mathit e}} )}$. If the ${}^{7}\mathrm {Be}$ solar-neutrino flux involves nonelectron flavor active neutrinos, their contribution to the flux is $\sim{}0.2$ times that of ${{\mathit \nu}_{{{e}}}}$.

VALUE ($ 10^{9} $ cm${}^{-2}$ s${}^{-1}$) DOCUMENT ID TECN  COMMENT • • We do not use the following data for averages, fits, limits, etc. • • $3.26$ $\pm0.52$ 1 GANDO 2015 KLND average flux $3.10$ $\pm0.15$ 2 BELLINI 2011 A BORX average flux 1  GANDO 2015 uses 165.4 kton$\cdot{}$day exposure of the KamLAND liquid scintillator detector to measure the 862 keV ${}^{7}\mathrm {Be}$ solar neutrino flux via ${{\mathit \nu}}−{{\mathit e}}$ elastic scattering 2  BELLINI 2011A reports the ${}^{7}\mathrm {Be}$ solar neutrino flux measured via ${{\mathit \nu}}−{{\mathit e}}$ elastic scattering. The data correspond to 740.7 live days between May 16, 2007 and May 8, 2010, and also correspond to 153.6 ton$\cdot{}$year fiducial exposure. BELLINI 2011A measured the 862 keV ${}^{7}\mathrm {Be}$ solar neutrino flux, which is an 89.6$\%$ branch of the ${}^{7}\mathrm {Be}$ solar neutrino flux, to be ($27.8$ $\pm1.3$) $ \times 10^{8}$ cm${}^{-2}~$s${}^{-1}$. Supercedes ARPESELLA 2008A.

References:

GANDO 2015 PR C92 055808 ${}^{7}\mathrm {Be}$ Solar Neutrino Measurement with KamLAND BELLINI 2011A PRL 107 141302 Precision Measurement of the ${}^{7}\mathrm {Be}$ Solar Neutrino Interaction Rate in Borexino