Constraints on Flavor-Diagonal Non-Standard Neutrino Interactions from Borexino Phase-II
Abstract
The Borexino detector measures solar neutrino fluxes via neutrino-electron elastic scattering. Observed spectra are determined by the solar- survival probability , 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 . In this paper, we search for such NSI's, in particular, flavor-diagonal neutral current interactions that modify the and 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 is obtained with a precision comparable to that achieved in reactor antineutrino experiments.
Keywords
Cite
@article{arxiv.1905.03512,
title = {Constraints on Flavor-Diagonal Non-Standard Neutrino Interactions from Borexino Phase-II},
author = {S. K. Agarwalla and M. Agostini and K. Altenmüller and S. Appel and V. Atroshchenko and Z. Bagdasarian and D. Basilico and G. Bellini and J. Benziger and D. Bick and G. Bonfini and D. Bravo and B. Caccianiga and F. Calaprice and A. Caminata and L. Cappelli and P. Cavalcante and F. Cavanna and A. Chepurnov and K. Choi and D. D'Angelo and S. Davini and A. Derbin and A. Di Giacinto and V. Di Marcello and X. F. Ding and A. Di Ludovico and L. Di Noto and I. Drachnev and K. Fomenko and A. Formozov and D. Franco and F. Gabriele and C. Galbiati and M. Gschwender and C. Ghiano and M. Giammarchi and A. Goretti and M. Gromov and D. Guffanti and C. Hagner and E. Hungerford and Aldo Ianni and Andrea Ianni and A. Jany and D. Jeschke and S. Kumaran and V. Kobychev and G. Korga and T. Lachenmaier and M. Laubenstein and E. Litvinovich and P. Lombardi and L. Ludhova and G. Lukyanchenko and L. Lukyanchenko and I. Machulin and G. Manuzio and S. Marcocci and J. Maricic and J. Martyn and E. Meroni and M. Meyer and L. Miramonti and M. Misiaszek and V. Muratova and B. Neumair and M. Nieslony and L. Oberauer and V. Orekhov and F. Ortica and M. Pallavicini and L. Papp and Ö. Penek and L. Pietrofaccia and N. Pilipenko and A. Pocar and G. Raikov and G. Ranucci and A. Razeto and A. Re and M. Redchuk and A. Romani and N. Rossi and S. Rottenanger and S. Schönert and D. Semenov and M. Skorokhvatov and O. Smirnov and A. Sotnikov and C. Sun and Y. Suvorov and T. Takeuchi and R. Tartaglia and G. Testera and J. Thurn and E. Unzhakov and A. Vishneva and R. B. Vogelaar and F. von Feilitzsch and M. Wojcik and M. Wurm and O. Zaimidoroga and S. Zavatarelli and K. Zuber and G. Zuzel},
journal= {arXiv preprint arXiv:1905.03512},
year = {2020}
}
Comments
28 pages, 7 figures. Slight modifications in the title, abstract, and conclusion. Few references added. Text expanded for clarity. Accepted in JHEP