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@ARTICLE{Agostini:906580,
author = {Agostini, M. and Altenmüller, K. and Appel, S. and
Atroshchenko, V. and Bagdasarian, Z. and Basilico, D. and
Bellini, G. and Benziger, J. and Biondi, R. and Bravo, D.
and Caccianiga, B. and Calaprice, F. and Caminata, A. and
Cavalcante, P. and Chepurnov, A. and D’Angelo, D. and
Davini, S. and Derbin, A. and Di Giacinto, A. and Di
Marcello, V. and Ding, X. F. and Di Ludovico, A. and Di
Noto, L. and Drachnev, I. and Formozov, A. and Franco, D.
and Galbiati, C. and Ghiano, C. and Giammarchi, M. and
Goretti, A. and Göttel, A. S. and Gromov, M. and Guffanti,
D. and Ianni, Aldo and Ianni, Andrea and Jany, A. and
Jeschke, D. and Kobychev, V. and Korga, G. and Kumaran, S.
and Laubenstein, M. and Litvinovich, E. and Lombardi, P. and
Lomskaya, I. and Ludhova, L. and Lukyanchenko, G. and
Lukyanchenko, L. and Machulin, I. and Martyn, J. and Meroni,
E. and Meyer, M. and Miramonti, L. and Misiaszek, M. and
Muratova, V. and Neumair, B. and Nieslony, M. and Nugmanov,
R. and Oberauer, L. and Orekhov, V. and Ortica, F. and
Pallavicini, M. and Papp, L. and Pelicci, L. and Penek, Ö.
and Pietrofaccia, L. and Pilipenko, N. and Pocar, A. and
Raikov, G. and Ranalli, M. T. and Ranucci, G. and Razeto, A.
and Re, A. and Redchuk, M. and Romani, A. and Rossi, N. and
Schönert, S. and Semenov, D. and Settanta, G. and
Skorokhvatov, M. and Singhal, A. and Smirnov, O. and
Sotnikov, A. and Suvorov, Y. and Tartaglia, R. and Testera,
G. and Thurn, J. and Unzhakov, E. and Vishneva, A. and
Vogelaar, R. B. and von Feilitzsch, F. and Wessel, A. and
Wojcik, M. and Wonsak, B. and Wurm, M. and Zavatarelli, S.
and Zuber, K. and Zuzel, G.},
title = {{C}orrelated and integrated directionality for sub-{M}e{V}
solar neutrinos in {B}orexino},
journal = {Physical review / D},
volume = {105},
number = {5},
issn = {2470-0010},
address = {Melville, NY},
publisher = {Inst.},
reportid = {FZJ-2022-01531},
pages = {052002},
year = {2022},
abstract = {Liquid scintillator detectors play a central role in the
detection of neutrinos from various sources. In particular,
it is the only technique used so far for the precision
spectroscopy of sub-MeV solar neutrinos, as demonstrated by
the Borexino experiment at the Gran Sasso National
Laboratory in Italy. The benefit of a high light yield, and
thus a low energy threshold and a good energy resolution,
comes at the cost of the directional information featured by
water Cherenkov detectors, measuring 8B solar neutrinos
above a few MeV. In this paper we provide the first
directionality measurement of sub-MeV solar neutrinos which
exploits the correlation between the first few detected
photons in each event and the known position of the Sun for
each event. This is also the first signature of
directionality in neutrinos elastically scattering off
electrons in a liquid scintillator target. This measurement
exploits the subdominant, fast Cherenkov light emission that
precedes the dominant yet slower scintillation light signal.
Through this measurement, we have also been able to extract
the rate of 7Be solar neutrinos in Borexino. The
demonstration of directional sensitivity in a traditional
liquid scintillator target paves the way for the possible
exploitation of the Cherenkov light signal in future
kton-scale experiments using liquid scintillator targets.
Directionality is important for background suppression as
well as the disentanglement of signals from various
sources.},
cin = {IKP-2},
ddc = {530},
cid = {I:(DE-Juel1)IKP-2-20111104},
pnm = {612 - Cosmic Matter in the Laboratory (POF4-612)},
pid = {G:(DE-HGF)POF4-612},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000767315300003},
doi = {10.1103/PhysRevD.105.052002},
url = {https://juser.fz-juelich.de/record/906580},
}