Precision Measurement of the Be7 Solar Neutrino Interaction Rate in Borexino
- Bellini, G.
- Benziger, J.
- Bick, D.
- Bonetti, S.
- Bonfini, G.
- Buizza Avanzini, M.
- Caccianiga, B.
- Cadonati, L.
- Calaprice, F.
- Carraro, C.
- Cavalcante, P.
- Chavarria, A.
- D'Angelo, D.
- Davini, S.
- Derbin, A.
- Etenko, A.
- Fomenko, K.
- Franco, D.
- Galbiati, C.
- 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.
- Peña-Garay, C.
- Perasso, L.
- Perasso, S.
- Pocar, A.
- Raghavan, R. S.
- Ranucci, G.
- Razeto, A.
- Re, A.
- Romani, A.
- Sabelnikov, A.
- Saldanha, R.
- Salvo, C.
- Schönert, S.
- Simgen, H.
- Skorokhvatov, M.
- Smirnov, O.
- Sotnikov, A.
- Sukhotin, S.
- Suvorov, Y.
- Tartaglia, R.
- Testera, G.
- Vignaud, D.
- Vogelaar, R. B.
- Von Feilitzsch, F.
- Winter, J.
- Wojcik, M.
- Wright, A.
- Wurm, M.
- Xu, J.
- Zaimidoroga, O.
- Zavatarelli, S.
- Zuzel, G.
DOIAbstract
The rate of neutrino-electron elastic scattering interactions from 862 keV Be7 solar neutrinos in Borexino is determined to be 46.0±1.5(stat)-1.6+1.5(syst)counts/(day*100ton). This corresponds to a νe-equivalent Be7 solar neutrino flux of (3.10±0.15)×109cm-2s-1 and, under the assumption of νe 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 5.0σ. A global solar neutrino analysis with free fluxes determines Φpp=6.06-0.06+0.02×1010cm-2s-1 and ΦCNO<1.3×109cm-2s-1 (95% C.L.). These results significantly improve the precision with which the Mikheyev-Smirnov-Wolfenstein large mixing angle neutrino oscillation model is experimenta...
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