Open AccessThe study of solar neutrinos and of non-standard neutrino interactions with Borexino
Author(s) -
S. Zavatarelli,
M. Agostini,
K. Altenmüller,
S. Appel,
V. Atroshchenko,
Z. Bagdasarian,
D. Basilico,
G. Bellini,
J. Benziger,
D. Bick,
G. Bonfini,
D. Bravo,
B. Caccianiga,
F. Calaprice,
A. Caminata,
L. Cappelli,
P. Cavalcante,
F. Cavanna,
A. Chepurnov,
K. Choi,
D. D’Angelo,
S. Davini,
A. Derbin,
A. Di Giacinto,
V. Di Marcello,
Xuefeng Ding,
A. Di Lüdovico,
L. Di Noto,
I. Drachnev,
A. Formozov,
D. Franco,
F. Gabriele,
C. Galbiati,
M. Gschwender,
C. Ghiano,
M. Giammarchi,
A. Goretti,
M. Gromov,
D. Güffanti,
C. Hagner,
E. Hungerford,
Aldo Ianni,
Andrea Ianni,
A. Jany,
D. Jeschke,
S. Kumaran,
V. Kobychev,
G. Korga,
T. Lachenmaier,
M. Laubenstein,
E. Litvinovich,
P. Lombardi,
I. Lomskaya,
L. Ludhová,
G. Lukyanchenko,
L. Lukyanchenko,
I. Machulin,
G. Manuzio,
S. Marcocci,
J. Maricic,
J. Martýn,
E. Meroni,
M. Meyer,
L. Miramonti,
M. Misiaszek,
V. Muratova,
B. Neumair,
M. Nieslony,
L. Oberauer,
V. Orekhov,
F. Ortica,
M. Pallavicini,
L. Papp,
Ö. Penek,
L. Pietrofaccia,
N. Pilipenko,
A. Pocar,
G. Raikov,
M. T. Ranalli,
G. Ranucci,
A. Razeto,
A. Re,
M. Redchuk,
Aldo Romani,
N. Rossi,
S. Rottenanger,
S. Schönert,
D. Semenov,
M. Skorokhvatov,
O. Smirnov,
A. Sotnikov,
Y. Suvorov,
R. Tartaglia,
G. Testera,
J. Thurn,
E. Unzhakov,
A. Vishneva,
R. B. Vogelaar,
F. von Feilitzsch,
M. Wójcik,
M. Wurm,
O. Zaimidoroga,
S. Zavatarelli,
Κ. Zuber,
G. Zuzel
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1468/1/012192
Subject(s) - borexino , neutrino , physics , solar neutrino , particle physics , algorithm , neutrino oscillation , computer science
The Borexino liquid scintillator neutrino observatory has a unique capability to perform high-precision solar neutrino observations thanks to its exceptional radiopurity and good energy resolution (5% at 1 MeV). A comprehensive study of the pp-chain neutrinos was presented that includes the direct measurements of 7 Be, pp and pep neutrino fluxes with the highest precision ever achieved (down to 2.8% in the 7 Be component), the 8 B with the lowest energy threshold, the best limit on CNO neutrinos and the first Borexino limit on hep neutrinos. These results are important to validate the MSW-LMA oscillation paradigm across the full solar energy range and to exclude possible Non-Standard neutrino Interactions (NSIs). In particular the effects of neutrino-flavor-diagonal Neutral-Current (NC) interactions that modify the v e e and v τ e couplings while preserving their chiral and flavor structures, have been investigated. At detection, the shape of the electron-recoil spectrum is affected by changes in the v e e and v τ e couplings, quantified by the parameters ε e L / R and ε τ L / R . New bounds to all four parameters were obtained, quite stringent compared to the global ones. In particular, the best constraint to-date on ε e L was achieved. A comprehensive summary of all the recent results on solar neutrinos from Borexino is reported in the present paper.