Borexino and General Neutrino Interactions

Abstract

We derive constraints on all possible general neutrino-electron interactions (scalar, vector, pseudoscalar, axialvector and tensor) using the recent real time Borexino event rate measurements of $pp$, $pep$ and ${}^{7}Be$ solar neutrinos. The limits improve several previous ones from TEXONO and CHARM-II for incoming electron and muon neutrinos, and are the first ones for the tau flavor. Future improvements by next-generation solar neutrino experiments are also studied. The limits extend the physics reach of solar neutrino measurements to TeV-scale physics. Finally, the different properties of the new interactions for Dirac and Majorana neutrinos are discussed.

arXiv comment12 pages, 3 figures and 5 tables; published version; comparison with NSI were added; figures slightly modified

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• Exploring the effects of Scalar Non Standard Interactions on the CP violation sensitivity at DUNE
• CE$\nu$NS as a probe of flavored generalized neutrino interactions
• Solar neutrino physics
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• Enhanced neutrino polarizability
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