Measurement of geo-neutrinos from 1353 days of Borexino

Bellini, G.; Benziger, J.; Bick, D.; Bonfini, G.; Bravo, D.; Avanzini, M. Buizza; Caccianiga, B.; Cadonati, L.; Calaprice, F.; Cavalcante, P.; Chavarría, Á.; Chepurnov, A.; D’Angelo, D.; Davini, S.; Derbin, A.; Empl, A.; Etenko, A.; Fiorentini, G.; Fomenko, K.; Franco, D.; Galbiati, C.; Gazzana, S.; Ghiano, C.; Giammarchi, M.; Goeger-Neff, M.; Goretti, A.; Grandi, L.; Hagner, C.; Hungerford, E.; Ianni, Aldo; Ianni, Andrea; Kobychev, V.; Korablëv, D.; Korga, G.; Koshio, Y.; Kryn, D.; Laubenstein, M.; Lewke, T.; Litvinovich, E.; Loer, B.; Lombardi, P.; Lombardi, F.; Ludhová, L.; Lukyanchenko, G.; Machulin, I.; Manecki, S.; Maneschg, W.; Mantovani, Fabio; Manuzio, G.; Meindl, Q.; Meroni, E.; Miramonti, L.; Misiaszek, M.; Mosteiro, P.; Muratova, V.; Oberauer, L.; Obolensky, M.; Ortica, F.; Otis, K.; Pallavicini, M.; Papp, L.; Perasso, L.; Perasso, S.; Pocar, A.; Ranucci, G.; Razeto, A.; Re, A.; Ricci, B.; Romani, A.; Rossi, N.; Sabelnikov, A.; Saldanha, R.; Salvo, C.; Schöenert, S.; Simgen, H.; Skorokhvatov, M.; Smirnov, O.; Sotnikov, A.; Sukhotin, S.; Suvorov, Y.; Tartaglia, R.; Testera, G.; Vignaud, D.; Vogelaar, R. B.; Feilitzsch, F. von; Winter, J.; Wójcik, Marcin; Wright, A.; Wurm, M.; Xu, J.; Zaimidoroga, O.; Zavatarelli, S.; Zuzel, G.

doi:10.1016/j.physletb.2013.04.030

Cited by 122 publications

(116 citation statements)

References 37 publications

(64 reference statements)

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“…A negligible amount of correlated events with a ∼1 s time constant were identified and their contribution in theν e time window determined. (3) (α,n) background for ν e search has been extensively discussed elsewhere [3][4][5][6][7]. The average rate of 210 Po in the dataset is determined to be (14.1±0.2) counts/(day·ton).…”

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confidence: 99%

“…This background has been estimated by individually tagging 214 Bi-214 Po decays. (6) Backgrounds from fast neutrons, untagged muons and spontaneous fission decays in the PMTs are the same as in previous papers [3,4]. Table I summarizes the estimated backgrounds for ν e candidates, expressed in number of events.…”

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confidence: 99%

“…The reactor and geo-neutrinos spec-tra are obtained by Monte Carlo and the backgrounds considered in this analysis are reported in Table I. The Monte Carlo spectra have been determined as reported in [4]. The reactor neutrinos signal has been calculated adopting the data from IAEA [12] updated to 2014 and the method described in [13].…”

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confidence: 99%

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Spectroscopy of geoneutrinos from 2056 days of Borexino data

Agostini¹,

Appel²,

Bellini³

et al. 2015

Phys. Rev. D

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104

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We report an improved geoneutrino measurement with Borexino from 2056 days of data taking. The present exposure is (5.5±0.3)×1031 proton×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) geoneutrino events. The null observation of geoneutrinos with Borexino alone has a probability of 3.6×10−9 (5.9σ). A geoneutrino 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

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confidence: 99%

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confidence: 99%

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Spectroscopy of geoneutrinos from 2056 days of Borexino data

Agostini¹,

Appel²,

Bellini³

et al. 2015

Phys. Rev. D

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104

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“…Antineutrinos are detected by means on inverse beta decay (IBD, threshold 1.8 MeV) on protons. The low radioactivity and the clean tag offered by the space-time coincidence between the prompt e + and the subsequent neutron capture ( = 254 s [9]) make accidental background essentially zero. The 144 Ce source -decays to 144 P r (t 1/2 = 296 days) which rapidly ( = 17 min) -decays to 144 Nd emittingν e s. The detection threshold for IBD is 1.8 MeV, matching adequately the energy of theν e emitted by the source (the end point of the 144 P r is about 3 MeV).…”

Section: Ce Anti-neutrino Sourcementioning

confidence: 99%

Short distance neutrino oscillations with Borexino

Caminata

Agostini

Altenmüller

et al. 2016

EPJ Web of Conferences

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Abstract. The Borexino detector has convincingly shown its outstanding performances in the low energy, sub-MeV regime through its unprecedented accomplishments in the solar and geo-neutrinos detection. These performances make it the ideal tool to accomplish a state-of-the-art experiment able to test unambiguously the long-standing issue of the existence of a sterile neutrino, as suggested by the several anomalous results accumulated over the past two decades, i.e. the outputs of the LSND and Miniboone experiments, the results of the source calibration of the two Gallium solar neutrino experiments, and the recently hinted reactor anomaly. The SOX project will exploit two sources, based on Chromium and Cerium, respectively, which deployed under the experiment, in a location foreseen on purpose at the time of the construction of the detector, will emit two intense beams of neutrinos (Cr) and anti-neutrinos (Ce). Interacting in the active volume of the liquid scintillator, each beam would create an unmistakable spatial wave pattern in case of oscillation of the ν e (orν e ) into the sterile state: such a pattern would be the smoking gun proving the existence of the new sterile member of the neutrino family. Otherwise, its absence will allow setting a very stringent limit on its existence.

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“…However, the very high radio purity of the scintillator offered new unexpected results, such as a clear evidence of the pep solar neutrinos [7], a low energy threshold (3 MeV) detection of 8 B neutrinos [8], an unambiguous detection of geo-neutrinos [9], and several additional results on the search of rare events [10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

First real–time detection of solar pp neutrinos by Borexino

Pallavicini

Bellini

Benziger

et al. 2016

EPJ Web of Conferences

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Abstract. Solar neutrinos have been pivotal to the discovery of neutrino flavour oscillations and are a unique tool to probe the reactions that keep the Sun shine. Although most of solar neutrino components have been directly measured, the neutrinos emitted by the keystone pp reaction, in which two protons fuse to make a deuteron, have so far eluded direct detection. The Borexino experiment, an ultra-pure liquid scintillator detector running at the Laboratori Nazionali del Gran Sasso in Italy, has now filled the gap, providing the first direct real time measurement of pp neutrinos and of the solar neutrino luminosity.

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Measurement of geo-neutrinos from 1353 days of Borexino

Cited by 122 publications

References 37 publications

Spectroscopy of geoneutrinos from 2056 days of Borexino data

Spectroscopy of geoneutrinos from 2056 days of Borexino data

Short distance neutrino oscillations with Borexino

First real–time detection of solar pp neutrinos by Borexino

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