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  Measurement of geo-neutrinos from 1353 days of Borexino

Bellini, G., Benziger, J., Bick, D., Bonfini, G., Bravo, D., Avanzini, M. B., et al. (2013). Measurement of geo-neutrinos from 1353 days of Borexino. Physics Letters B, 722(4-5), 295-300. doi:10.1016/j.physletb.2013.04.030.

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Bellini, G.1, Author
Benziger, J.2, Author
Bick, D.3, Author
Bonfini, G.4, Author
Bravo, D.5, Author
Avanzini, M. Buizza6, Author
Caccianiga, B.1, Author
Cadonati, L.7, Author
Calaprice, F.8, Author
Cavalcante, P.4, Author
Chavarria, A.8, Author
Chepurnov, A.9, Author
D'Angelo, D.1, Author
Davini, S.10, Author
Derbin, A.11, Author
Empl, A.10, Author
Etenko, A.12, Author
Fiorentini, G.13, Author
Fomenko, K.14, Author
Franco, D.6, Author
Galbiati, C.8, AuthorGazzana, S.4, AuthorGhiano, C.6, AuthorGiammarchi, M.1, AuthorGoeger-Neff, M.15, AuthorGoretti, A.8, AuthorGrandi, L.8, AuthorHagner, C.3, AuthorHungerford, E.10, AuthorIanni, Aldo4, AuthorIanni, Andrea8, AuthorKobychev, V. V.16, AuthorKorablev, D.14, AuthorKorga, G.10, AuthorKoshio, Y.4, AuthorKryn, D.6, AuthorLaubenstein, M.4, AuthorLewke, T.15, AuthorLitvinovich, E.12, AuthorLoer, B.8, AuthorLombardi, P.1, AuthorLombardi, F.4, AuthorLudhova, L.1, AuthorLukyanchenko, G.12, AuthorMachulin, I.12, AuthorManecki, S.5, AuthorManeschg, W.17, Author           Mantovani, F.13, AuthorManuzio, G.18, AuthorMeindl, Q.15, AuthorMeroni, E.1, AuthorMiramonti, L.1, AuthorMisiaszek, M.19, AuthorMosteiro, P.8, AuthorMuratova, V.11, AuthorOberauer, L.15, AuthorObolensky, M.6, AuthorOrtica, F.20, AuthorOtis, K.7, AuthorPallavicini, M.18, AuthorPapp, L.5, AuthorPerasso, L.18, AuthorPerasso, S.18, AuthorPocar, A.7, AuthorRanucci, G.1, AuthorRazeto, A.4, AuthorRe, A.1, AuthorRicci, B.13, AuthorRomani, A.20, AuthorRossi, N.4, AuthorSabelnikov, A.12, AuthorSaldanha, R.8, AuthorSalvo, C.18, AuthorSchoenert, S.15, AuthorSimgen, H.17, Author           Skorokhvatov, M.12, AuthorSmirnov, O.14, AuthorSotnikov, A.14, AuthorSukhotin, S.12, AuthorSuvorov, Y.12, AuthorSuvorov, Y21, AuthorTartaglia, R.4, AuthorTestera, G.18, AuthorVignaud, D.6, AuthorVogelaar, R. B.5, Authorvon Feilitzsch, F.15, AuthorWinter, J.15, AuthorWojcik, M.19, AuthorWright, A.8, AuthorWurm, M.3, AuthorXu, J.8, AuthorZaimidoroga, O.14, AuthorZavatarelli, S.18, AuthorZuzel, G.19, Author more..
Affiliations:
1Universita degli Studi and INFN, 20133 Milano, Italy, ou_persistent22              
2Chemical Engineering Department, Princeton University, Princeton, NJ 08544, USA, ou_persistent22              
3University of Hamburg, 22761 Hamburg, Germany, ou_persistent22              
4INFN Laboratori Nazionali del Gran Sasso, 67010 Assergi (AQ), Italy, ou_persistent22              
5Virginia Polytechnic Institute and State University, Blacksburg, VA 24061 USA, ou_persistent22              
6APC, Universite Paris Diderot, Obs de Paris, Sorbonne Paris Cite, France, ou_persistent22              
7University of Massachusetts, Amherst, MA 01003 USA, ou_persistent22              
8Physics Department, Princeton University, Princeton, NJ 08544, USA, ou_persistent22              
9Lomonosov Moscow State University, Moscow 119234 Russia, ou_persistent22              
10Department of Physics, University of Houston, Houston, TX 77204, USA, ou_persistent22              
11St. Petersburg Nuclear Physics Institute, 188350 Gatchina, Russia, ou_persistent22              
12NRC Kurchatov Institute , 123182 Moscow, Russia, ou_persistent22              
13Dipartimento di Fisica e Scienze della Terra, Universita degli Studi and INFN, Ferrara I-44122, Italy, ou_persistent22              
14Joint Institute for Nuclear Research , 141980 Dubna, Russia, ou_persistent22              
15Physik Department, Technische Universität München, 85748 Garching, Germany, ou_persistent22              
16Institute for Nuclear Research, 03680 Kiev, Ukraine, ou_persistent22              
17Division Prof. Dr. Manfred Lindner, MPI for Nuclear Physics, Max Planck Society, ou_904549              
18Dipartimento di Fisica, Universita and INFN, Genova 16146 , Italy, ou_persistent22              
19M.Smoluchowski Institute of Physics, Jagiellonian University, 30059 Cracow, Poland, ou_persistent22              
20Dipartimento di Chimica, Universita e INFN, 06123 Perugia, Italy, ou_persistent22              
21Physics and Astronomy Department, University of California Los Angeles, Los Angeles, CA 90095, USA, ou_persistent22              

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Free keywords: High Energy Physics - Experiment, hep-ex, Physics, Instrumentation and Detectors, physics.ins-det
 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 $\pm$ 0.16) $\times$ $10^{31}$ proton $\times$ year after all selection cuts and background subtraction, we detected (14.3 $\pm$ 4.4) geo-neutrino events assuming a fixed chondritic mass Th/U ratio of 3.9. This corresponds to a geo-neutrino signal $S_{geo}$ = (38.8 $\pm$ 12.0) TNU with just a 6 $\times$ $10^{-6}$ probability for a null geo-neutrino measurement. With U and Th left as free parameters in the fit, the relative signals are $S_{\mathrm{Th}}$ = (10.6 $\pm$ 12.7) TNU and $S_\mathrm{U}$ = (26.5 $\pm$ 19.5) TNU. Borexino data alone are compatible with a mantle geo--neutrino signal of (15.4 $\pm$ 12.3) TNU, while a combined analysis with the KamLAND data allows to extract a mantle signal of (14.1 $\pm$ 8.1) TNU. Our measurement of a reactor anti--neutrino signal $S_{react}$ = 84.5$^{+19.3}_{-18.9}$ TNU is in agreement with expectations in the presence of neutrino oscillations.

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 Dates: 2013-03-112013-04-042013-05-24
 Publication Status: Published online
 Pages: 9 pages, 6 figures
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
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Title: Physics Letters B
Source Genre: Journal
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Publ. Info: North-Holland
Pages: - Volume / Issue: 722 (4-5) Sequence Number: - Start / End Page: 295 - 300 Identifier: ISSN: 0370-2693
CoNE: https://pure.mpg.de/cone/journals/resource/954925524777