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Measurement of neutrino flux from the primary proton--proton fusion process in the Sun with Borexino detector

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arxiv 1507.02432 v1 pith:HCNNP4HK submitted 2015-07-09 hep-ex nucl-exphysics.ins-det

Measurement of neutrino flux from the primary proton--proton fusion process in the Sun with Borexino detector

classification hep-ex nucl-exphysics.ins-det
keywords detectorneutrinoborexinoenergyfluxfusionproductiontime
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Neutrino produced in a chain of nuclear reactions in the Sun starting from the fusion of two protons, for the first time has been detected in a real-time detector in spectrometric mode. The unique properties of the Borexino detector provided an oppurtunity to disentangle pp-neutrino spectrum from the background components. A comparison of the total neutrino flux from the Sun with Solar luminosity in photons provides a test of the stability of the Sun on the 10$^{5}$ years time scale, and sets a strong limit on the power production in the unknown energy sources in the Sun of no more than 4\% of the total energy production at 90\% C.L.

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