Measurement of geo-neutrinos from 1353 days of Borexino - IN2P3 - Institut national de physique nucléaire et de physique des particules
Journal Articles Physics Letters B Year : 2013

Measurement of geo-neutrinos from 1353 days of Borexino

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
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A. Empl
  • Function : Author
A. Etenko
  • Function : Author
G. Fiorentini
  • Function : Author
K. Fomenko
  • Function : Author
D. Franco
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
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G. Korga
  • Function : Author
Y. Koshio
  • Function : Author
T. Lewke
  • Function : Author
E. Litvinovich
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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
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W. Maneschg
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F. Mantovani
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G. Manuzio
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Q. Meindl
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E. Meroni
  • Function : Author
L. Miramonti
  • Function : Author
M. Misiaszek
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P. Mosteiro
  • Function : Author
V. Muratova
  • Function : Author
L. Oberauer
  • Function : Author
K. Otis
  • Function : Author
M. Pallavicini
L. Papp
  • Function : Author
L. Perasso
  • Function : Author
A. Pocar
  • Function : Author
G. Ranucci
  • Function : Author
A. Razeto
  • Function : Author
A. Re
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B. Ricci
  • Function : Author
A. Romani
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N. Rossi
  • Function : Author
A. Sabelnikov
  • Function : Author
R. Saldanha
  • Function : Author
C. Salvo
  • Function : Author
S. Schönert
  • Function : Author
H. Simgen
M. Skorokhvatov
  • Function : Author
O. Smirnov
  • Function : Author
A. Sotnikov
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S. Sukhotin
  • Function : Author
Y. Suvorov
  • Function : Author
R. Tartaglia
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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
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S. Zavatarelli
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G. Zuzel
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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.

Dates and versions

in2p3-00873963 , version 1 (16-10-2013)

Identifiers

Cite

G. Bellini, J. Benziger, D. Bick, G. Bonfini, D. Bravo, et al.. Measurement of geo-neutrinos from 1353 days of Borexino. Physics Letters B, 2013, 722, pp.295-300. ⟨10.1016/J.PHYSLETB.2013.04.030⟩. ⟨in2p3-00873963⟩
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