Measurement of the solar 8B neutrino flux down to 2.8 MeV with Borexino

被引：1
|
作者：
Franco, D. [1 ,2 ]
机构：
[1] Univ Milan, I-20133 Milan, Italy
[2] Ist Nazl Fis Nucl, I-20133 Milan, Italy
来源：
NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS | 2009年 / 188卷
关键词：
D O I：
10.1016/j.nuclphysbps.2009.02.030
中图分类号：
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号：
摘要：
We report the measurement of the (8)B solar neutrinos interaction rate with the Borexino detector. The extremly high radio-purity reached in the Borexino scintillator, combined with the efficient software rejection of cosmogenic background, allows to investigate the recoiled electron spectrum, induced by 8 B solar neutrinos, down to the unprecedented energy threshold of 2.8 MeV. The rate of 8 B solar neutrino interaction as measured through their scattering on the target electrons is 0.26 +/- 0.04(stat) +/- 0.02(syst) c/d/100 tons. This corresponds to an equivalent electron neutrino flux of (2.65 +/- 0.44(stat) +/- 0.18(syst)) x 10(6) cm(-2)s(-1), as derived from the elastic scattering only, in good agreement with existing measurements and predictions.
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页码：127 / 129
页数：3
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