%0 Journal Article
%T Precision Measurement of the (7)Be Solar Neutrino Interaction Rate in Borexino
%A Borexino Collaboration (Bellini, G. et al
%A Pena-Garay, C.
%J Physical Review Letters
%D 2011
%V 107
%N 14
%I Amer Physical Soc
%@ 0031-9007
%G English
%F BorexinoCollaborationBellini+Pena-Garay2011
%O WOS:000296285800007
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=793), last updated on Fri, 18 Nov 2011 09:57:27 +0000
%X The rate of neutrino-electron elastic scattering interactions from 862 keV (7)Be solar neutrinos in Borexino is determined to be 46.0 +/- 1.5(stat)(-1.6)(+1.5)(syst)counts/(day . 100 ton). This corresponds to a nu(e)-equivalent (7)Be solar neutrino flux of (3.10 +/- 0.15) x 10(9) cm(-2) s(-1) and, under the assumption of nu(e) transition to other active neutrino flavours, yields an electron neutrino survival probability of 0.51 +/- 0.07 at 862 keV. The no flavor change hypothesis is ruled out at 5.0 sigma. A global solar neutrino analysis with free fluxes determines Phi(pp) = 6.06(-0.66)(+0.02) x 10(10) cm(-2) s(-1) and Phi(CNO) < 1.3 x 10(9) cm(-2) s(-1) (95% C.L.). These results significantly improve the precision with which the Mikheyev-Smirnov-Wolfenstein large mixing angle neutrino oscillation model is experimentally tested at low energy.
%R 10.1103/PhysRevLett.107.141302
%U http://arxiv.org/abs/1104.1816
%U https://doi.org/10.1103/PhysRevLett.107.141302
%P 141302-5pp