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29 March 2024
 
  » arxiv » 1506.4610

 Article overview


Spectroscopy of geo-neutrinos from 2056 days of Borexino data
Borexino collaboration ; M. Agostini ; S. Appel ; G. Bellini ; J. Benziger ; D. Bick ; G. Bonfini ; D. Bravo ; B. Caccianiga ; F. Calaprice ; A. Caminata ; P. Cavalcante ; A. Chepurnov ; K. Choi ; D. DAngelo ; S. Davini ; A. Derbin ; L. Di Noto ; I. Drachnev ; A. Empl ; A. Etenko ; G. Fiorentini ; K. Fomenko ; D. Franco ; F. Gabriele ; C. Galbiati ; C. Ghiano ; M. Giammarchi ; M. Goger-Neff ; A. Goretti ; M. Gromov ; C. Hagner ; E. Hungerford ; Aldo Ianni ; Andrea Ianni ; K. Jedrzejczak ; M. Kaiser ; V. Kobychev ; D. Korablev ; G. Korga ; D. Kryn ; M. Laubenstein ; B. Lehnert ; E. Litvinovich ; F. Lombardi ; P. Lombardi ; L. Ludhova ; G. Lukyanchenko ; I. Machulin ; S. Manecki ; W. Maneschg ; F. Mantovani ; S. Marcocci ; E. Meroni ; M. Meyer ; L. Miramonti ; M. Misiaszek ; M. Montuschi ; P. Mosteiro ; V. Muratova ; L. Oberauer ; M. Obolensky ; F. Ortica ; K. Otis ; L. Pagani ; M. Pallavicini ; L. Papp ; L. Perasso ; S. Perasso ; A. Pocar ; G. Ranucci ; A. Razeto ; A. Re ; B. Ricci ; A. Romani ; R. Roncin ; N. Rossi ; S. Schoenert ; D. Semenov ; M. Skorokhavatov ; O. Smirnov ; A. Sotnikov ; S. Sukhotin ; Y. Suvorov ; R. Tartaglia ; G. Testera ; J. Thurn ; M. Toropova ; E. Unzhakov ; R.B. Vogelaar ; F. von Feilitzsch ; H. Wang ; S. Weinz ; J. Winter ; M. Woicik ; M. Wurm ; Z. Yokley ; O. Zaimidoroga ; S. Zavatarelli ; K. Zuber ; G. Zuzel ;
Date 15 Jun 2015
AbstractWe report an improved geo-neutrino measurement with Borexino from 2056 days of data taking. The present exposure is $(5.5pm0.3) imes10^{31}$ proton$ imes$yr. Assuming a chondritic Th/U mass ratio of 3.9, we obtain $23.7 ^{+6.5}_{-5.7} (stat) ^{+0.9}_{-0.6} (sys)$ geo-neutrino events. The null observation of geo-neutrinos with Borexino alone has a probability of $3.6 imes 10^{-9}$ (5.9$sigma$). A geo-neutrino signal from the mantle is obtained at 98\% C.L. The radiogenic heat production for U and Th from the present best-fit result is restricted to the range 23-36 TW, taking into account the uncertainty on the distribution of heat producing elements inside the Earth.
Source arXiv, 1506.4610
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