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Absence of a day-night asymmetry in the 7Be solar neutrino rate in Borexino

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Absence of a day-night asymmetry in the 7Be solar neutrino rate in Borexino

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dc.contributor.author Borexino Collaboration
dc.contributor.author Bellini, Gianpaolo
dc.contributor.author Peña Garay, Carlos
dc.date.accessioned 2014-11-04T09:20:57Z
dc.date.available 2014-11-04T09:20:57Z
dc.date.issued 2012
dc.identifier.citation Borexino Collaboration Bellini, Gianpaolo Peña Garay, Carlos 2012 Absence of a day-night asymmetry in the 7Be solar neutrino rate in Borexino Physics Letters B 707 1 22 26
dc.identifier.uri http://hdl.handle.net/10550/39566
dc.description.abstract We report on a search for the day-night asymmetry of the Be-7 solar neutrino rate measured by Borexino at the Laboratori Nazionali del Gran Sasso (LNGS), Italy. The measured value, Adn=0.001 +- 0.012 (stat) +- 0.007 (syst), shows the absence of a significant asymmetry. This result alone rejects the so-called LOW solution at more than 8.5 sigma. Combined with the other solar neutrino data, it isolates the Large Mixing Angle (LMA) -- MSW solution at DeltaChi2 > 190 without relying on the assumption of CPT symmetry in the neutrino sector. We also show that including the day-night asymmetry, data from Borexino alone restricts the MSW neutrino oscillations to the LMA solution at 90% confidence level.
dc.language.iso eng
dc.relation.ispartof Physics Letters B, 2012, vol. 707, num. 1, p. 22-26
dc.subject Física
dc.title Absence of a day-night asymmetry in the 7Be solar neutrino rate in Borexino
dc.type journal article es_ES
dc.date.updated 2014-11-04T09:20:58Z
dc.identifier.doi 10.1016/j.physletb.2011.11.025
dc.identifier.idgrec 080414
dc.rights.accessRights open access es_ES

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