Measurement of geo-neutrinos from 1353 days of Borexino
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G. Bellini
- Function : Author
J. Benziger
- Function : Author
D. Bick
- Function : Author
G. Bonfini
- Function : Author
D. Bravo
- Function : Author
L. Cadonati
- Function : Author
F. Calaprice
- Function : Author
P. Cavalcante
- Function : Author
A. Chavarria
- Function : Author
A. Chepurnov
- Function : Author
D. d'Angelo
- Function : Author
S. Davini
- Function : Author
A. Derbin
- Function : Author
A. Empl
- Function : Author
A. Etenko
- Function : Author
G. Fiorentini
- Function : Author
K. Fomenko
- Function : Author
D. Franco
- Function : Author
- PersonId : 755376
- ORCID : 0000-0002-7790-1224
S. Gazzana
- Function : Author
M. Goeger-Neff
- Function : Author
A. Goretti
- Function : Author
L. Grandi
- Function : Author
C. Hagner
- Function : Author
E. Hungerford
- Function : Author
Aldo Ianni
- Function : Author
Andrea Ianni
- Function : Author
V. V. Kobychev
- Function : Author
D. Korablev
- Function : Author
G. Korga
- Function : Author
Y. Koshio
- Function : Author
T. Lewke
- Function : Author
E. Litvinovich
- Function : Author
B. Loer
- Function : Author
P. Lombardi
- Function : Author
F. Lombardi
- Function : Author
L. Ludhova
- Function : Author
G. Lukyanchenko
- Function : Author
I. Machulin
- Function : Author
S. Manecki
- Function : Author
W. Maneschg
- Function : Author
F. Mantovani
- Function : Author
G. Manuzio
- Function : Author
Q. Meindl
- Function : Author
E. Meroni
- Function : Author
L. Miramonti
- Function : Author
M. Misiaszek
- Function : Author
P. Mosteiro
- Function : Author
V. Muratova
- Function : Author
L. Oberauer
- Function : Author
K. Otis
- Function : Author
M. Pallavicini
- Function : Author
- PersonId : 755306
- ORCID : 0000-0001-7309-3023
- IdRef : 241090474
L. Papp
- Function : Author
L. Perasso
- Function : Author
A. Pocar
- Function : Author
G. Ranucci
- Function : Author
A. Razeto
- Function : Author
A. Re
- Function : Author
B. Ricci
- Function : Author
A. Romani
- Function : Author
N. Rossi
- Function : Author
A. Sabelnikov
- Function : Author
R. Saldanha
- Function : Author
C. Salvo
- Function : Author
S. Schönert
- Function : Author
H. Simgen
- Function : Author
- PersonId : 755331
- ORCID : 0000-0003-3074-0395
M. Skorokhvatov
- Function : Author
O. Smirnov
- Function : Author
A. Sotnikov
- Function : Author
S. Sukhotin
- Function : Author
Y. Suvorov
- Function : Author
R. Tartaglia
- Function : Author
G. Testera
- Function : Author
F. von Feilitzsch
- Function : Author
J. Winter
- Function : Author
M. Wojcik
- Function : Author
A. Wright
- Function : Author
M. Wurm
- Function : Author
J. Xu
- Function : Author
O. Zaimidoroga
- Function : Author
S. Zavatarelli
- Function : Author
G. Zuzel
- Function : Author
Abstract
We present a measurement of the geo-neutrino signal obtained from 1353 days of data with the Borexino detector at Laboratori Nazionali del Gran Sasso in Italy. With a fiducial exposure of (3.69±0.16)×1031 proton × year after all selection cuts and background subtraction, we detected (14.3±4.4) geo-neutrino events assuming a fixed chondritic mass Th/U ratio of 3.9. This corresponds to a geo-neutrino signal Sgeo=(38.8±12.0) TNU with just a 6×10-6 probability for a null geo-neutrino measurement. With U and Th left as free parameters in the fit, the relative signals are STh=(10.6±12.7) TNU and SU=(26.5±19.5) TNU. Borexino data alone are compatible with a mantle geo-neutrino signal of (15.4±12.3) TNU, while a combined analysis with the KamLAND data allows to extract a mantle signal of (14.1±8.1) TNU. Our measurement of 31.2-6.1+7.0 reactor anti-neutrino events is in agreement with expectations in the presence of neutrino oscillations.