Measurement of geo-neutrinos from 1353 days of Borexino
Author(s): Bellini, G; Benziger, Jay B.; Bick, D; Bonfini, G; Bravo, D; et al
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http://arks.princeton.edu/ark:/88435/pr1mj00| Abstract: | We present a measurement of the geo-neutrino signal obtained from 1353 days of data with the Borexino detector at Laboratori Nazionali del Gran Sasso in Italy. With a fiducial exposure of (3.69 +/- 0.16) x 10(31) proton x year after all selection cuts and background subtraction, we detected (14.3 +/- 4.4) geo-neutrino events assuming a fixed chondritic mass Th/U ratio of 3.9. This corresponds to a geo-neutrino signal S-geo = (38.8 +/- 12.0) TNU with just a 6 x 10(-6) probability for a null geo-neutrino measurement. With U and Th left as free parameters in the fit, the relative signals are S-Th = (10.6 +/- 12.7) TNU and S-U = (26.5 +/- 19.5) TNU. Borexino data alone are compatible with a mantle geo-neutrino signal of (15.4 +/- 12.3) TNU, while a combined analysis with the KamLAND data allows to extract a mantle signal of (14.1 +/-. 8.1) TNU. Our measurement of 31.2(-6.1)(+7.0) reactor anti-neutrino events is in agreement with expectations in the presence of neutrino oscillations. (c) 2013 Elsevier B.V. All rights reserved. |
| Publication Date: | 24-May-2013 |
| Electronic Publication Date: | 15-Apr-2013 |
| Citation: | Bellini, G, Benziger, J, Bick, D, Bonfini, G, Bravo, D, Avanzini, M Buizza, Caccianiga, B, Cadonati, L, Calaprice, F, Cavalcante, P, Chavarria, A, Chepurnov, A, D Angelo, D, Davini, S, Derbin, A, Empl, A, Etenko, A, Fiorentini, G, Fomenko, K, Franco, D, Galbiati, C, Gazzana, S, Ghiano, C, Giammarchi, M, Goeger-Neff, M, Goretti, A, Grandi, L, Hagner, C, Hungerford, E, Ianni, Aldo, Ianni, Andrea, Kobychev, VV, Korablev, D, Korga, G, Koshio, Y, Kryn, D, Laubenstein, M, Lewke, T, Litvinovich, E, Loer, B, Lombardi, P, Lombardi, F, Ludhova, L, Lukyanchenko, G, Machulin, I, Manecki, S, Maneschg, W, Mantovani, F, Manuzio, G, Meindl, Q, Meroni, E, Miramonti, L, Misiaszek, M, Mosteiro, R, Muratova, V, Oberauer, L, Obolensky, M, Ortica, F, Otis, K, Pallavicini, M, Papp, L, Perasso, L, Perasso, S, Pocar, A, Ranucci, G, Razeto, A, Re, A, Ricci, B, Romani, A, Rossi, N, 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, Zuzels, G, Collaboration, Borexino. (2013). Measurement of geo-neutrinos from 1353 days of Borexino. PHYSICS LETTERS B, 722 (295 - 300. doi:10.1016/j.physletb.2013.04.030 |
| DOI: | doi:10.1016/j.physletb.2013.04.030 |
| ISSN: | 0370-2693 |
| EISSN: | 1873-2445 |
| Pages: | 295 - 300 |
| Type of Material: | Journal Article |
| Journal/Proceeding Title: | PHYSICS LETTERS B |
| Version: | Final published version. This is an open access article. |
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