Recent results of the Borexino experiment

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• 作者：S. Davini¹ ; ² ; ^{Stefano.Davini@ge.infn.it}
• 关键词：Solar neutrinos ; Neutrino oscillations ; MSW effect ; Day-night effect ; Low background detector ; Liquid scintillators
• 刊名：Progress in Particle and Nuclear Physics
• 出版年：2012
• 期刊代码：64_01466410
• 类别：ph
• 出版时间：April, 2012
• 卷：67
• 期：2
• 页码：553-557
• 文件大小：425 K

摘要

Borexino is a low background liquid scintillation detector acquiring solar neutrino data at the LNGS underground laboratory in Italy. Borexino is capable to perform spectral-resolved measurements of the low-energy Be and solar neutrinos. Borexino has performed the first direct measurement of the Be solar neutrino rate with accuracy better than 5%. The absence of day-night asymmetry of the Be solar neutrino rate was measured with a total uncertainty of 1%. Borexino results alone reject the LOW region of solar neutrino oscillation parameters at more than 8.5 CL. Combined with the other solar neutrino data, Borexino measurements isolate the MSW-LMA solution of neutrino oscillations without assuming CPT invariance in the neutrino sector. Borexino has also directly observed, for the first time, solar neutrinos in the 1.0-1.5聽MeV energy range, leading to the first direct evidence of the solar neutrino signal and the strongest constraint of the CNO solar neutrino flux up to date.