Constraints on flavor-diagonal non-standard neutrino interactions from Borexino Phase-II

The Borexino Collaboration

Research output: Contribution to journalArticlepeer-review

20 Scopus citations


The Borexino detector measures solar neutrino fluxes via neutrino-electron elastic scattering. Observed spectra are determined by the solar-νe survival probability Pee(E), and the chiral couplings of the neutrino and electron. Some theories of physics beyond the Standard Model postulate the existence of Non-Standard Interactions (NSI’s) which modify the chiral couplings and Pee(E). In this paper, we search for such NSI’s, in particular, flavor-diagonal neutral current interactions that modify the νee and ντe couplings using Borexino Phase II data. Standard Solar Model predictions of the solar neutrino fluxes for both high- and low-metallicity assumptions are considered. No indication of new physics is found at the level of sensitivity of the detector and constraints on the parameters of the NSI’s are placed. In addition, with the same dataset the value of sin2θW is obtained with a precision comparable to that achieved in reactor antineutrino experiments [Figure not available: see fulltext.].

Original languageEnglish (US)
Article number38
JournalJournal of High Energy Physics
Issue number2
StatePublished - Feb 1 2020

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics


  • Beyond Standard Model
  • Neutrino Physics


Dive into the research topics of 'Constraints on flavor-diagonal non-standard neutrino interactions from Borexino Phase-II'. Together they form a unique fingerprint.

Cite this