TY  - JOUR
AU  - Borexino Collaboration (Bellini, G. et al
AU  - Pena-Garay, C.
PY  - 2011
DA  - 2011//
TI  - Precision Measurement of the (7)Be Solar Neutrino Interaction Rate in Borexino
T2  - Phys. Rev. Lett.
JO  - Physical Review Letters
SP  - 141302
EP  - 5pp
VL  - 107
IS  - 14
PB  - Amer Physical Soc
AB  - 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.
SN  - 0031-9007
UR  - http://arxiv.org/abs/1104.1816
UR  - https://doi.org/10.1103/PhysRevLett.107.141302
DO  - 10.1103/PhysRevLett.107.141302
LA  - English
N1  - WOS:000296285800007
ID  - BorexinoCollaborationBellini+Pena-Garay2011
ER  -