Absence of a day-night asymmetry in the Be-7 solar neutrino rate in Borexino
Author(s): Bellini, G; Benziger, Jay B.; Bick, D; Bonetti, S; Bonfini, G; et al
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http://arks.princeton.edu/ark:/88435/pr1st7n| Abstract: | We report the result of a search for a day-night asymmetry in the Be-7 solar neutrino interaction rate in the Borexino detector at the Laboratori Nazionali del Gran Sasso (LNGS) in Italy. The measured asymmetry is A(dn) = 0.001 +/- 0.012 (stat) +/- 0.007 (syst), in agreement with the prediction of MSW-LMA solution for neutrino oscillations. This result disfavors MSW oscillations with mixing parameters in the LOW region at more than 8.5 sigma. This region is, for the first time, strongly disfavored without the use of reactor anti-neutrino data and therefore the assumption of CPT symmetry. The result can also be used to constrain some neutrino oscillation scenarios involving new physics. (C) 2011 Elsevier B.V. All rights reserved. |
| Publication Date: | 16-Jan-2012 |
| Electronic Publication Date: | 25-Nov-2011 |
| Citation: | Bellini, G, Benziger, J, Bick, D, Bonetti, S, Bonfini, G, Avanzini, M Buizza, Caccianiga, B, Cadonati, L, Calaprice, F, Carraro, C, Cavalcante, P, Chavarria, A, D Angelo, D, Davini, S, Derbin, A, Etenko, A, von Feilitzsch, F, 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, P, Lombardi, F, 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, Winter, J, Wojcik, M, Wright, A, Wurm, M, Xu, J, Zaimidoroga, O, Zavatarelli, S, Zuzel, G. (2012). Absence of a day-night asymmetry in the Be-7 solar neutrino rate in Borexino. PHYSICS LETTERS B, 707 (22 - 26. doi:10.1016/j.physletb.2011.11.025 |
| DOI: | doi:10.1016/j.physletb.2011.11.025 |
| ISSN: | 0370-2693 |
| EISSN: | 1873-2445 |
| Pages: | 22 - 26 |
| Type of Material: | Journal Article |
| Journal/Proceeding Title: | PHYSICS LETTERS B |
| Version: | Author's manuscript |
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