Precision Measurement of the Be-7 Solar Neutrino Interaction Rate in Borexino
- Bellini, G
- Benziger, Jay B.
- Bick, D
- Bonetti, S
- Bonfini, G
- Avanzini, M Buizza
- Caccianiga, B
- Cadonati, L
- Calaprice, Frank P.
- Carraro, C
- Cavalcante, P
- Chavarria, A
- D Angelo, D
- Davini, S
- Derbin, A
- Etenko, A
- Fomenko, K
- Franco, D
- Galbiati, Cristiano
- Gazzana, S
- Ghiano, C
- Giammarchi, M
- Goeger-Neff, M
- Goretti, A
- Grandi, L
- Guardincerri, E
- Hardy, S
- Ianni, Aldo
- Ianni, Andrea
- Kobychev, V
- Korablev, D
- Korga, G
- Koshio, Y
- Kryn, D
- Laubenstein, M
- Lewke, T
- Litvinovich, E
- Loer, B
- Lombardi, F
- Lombardi, P
- Ludhova, L
- Machulin, I
- Manecki, S
- Maneschg, W
- Manuzio, G
- Meindl, Q
- Meroni, E
- Miramonti, L
- Misiaszek, M
- Montanari, D
- Mosteiro, P
- Muratova, V
- Oberauer, L
- Obolensky, M
- Ortica, F
- Pallavicini, M
- Papp, L
- Pena-Garay, C
- Perasso, L
- Perasso, S
- Pocar, A
- Raghavan, RS
- Ranucci, G
- Razeto, A
- Re, A
- Romani, A
- Sabelnikov, A
- Saldanha, R
- Salvo, C
- Schoenert, S
- Simgen, H
- Skorokhvatov, M
- Smirnov, O
- Sotnikov, A
- Sukhotin, S
- Suvorov, Y
- Tartaglia, R
- Testera, G
- Vignaud, D
- Vogelaar, RB
- von Feilitzsch, F
- Winter, J
- Wojcik, M
- Wright, A
- Wurm, M
- Xu, J
- Zaimidoroga, O
- Zavatarelli, S
- Zuzel, G
- Collaboration, Borexino
DOIAbstract
The rate of neutrino-electron elastic scattering interactions from 862 keV Be-7 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 Be-7 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-Sm...
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