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1. Recent Borexino results and perspectives of the SOX measurement

Author

Porcelli A., Agostini M., Altenmüller K., Appel S., Atroshchenko V., Bagdasarian Z., Basilico D., Bellini G., Benziger J., Bick D., Bonfini G., Bravo D., Caccianiga B., Calaprice F., Caminata A., Caprioli S., Carlini M., Cavalcante P., Chepurnov A., Choi K., Cloué O., Cribier M., D'Angelo D., Davini S., Derbin A., Ding X.F., Di Ludovico A., Di Noto L., Drachnev I., Durero M., Farinon S., Fischer V., Fomenko K., Formozov A., Franco D., Froborg F., Gabriele F., Gaffiot J., Galbiati C., Ghiano C., Giammarchi M., Goretti A., Gromov M., Gschwender M., Hagner C., Houdy T., Hungerford E., Ianni Aldo, Ianni Andrea, Jonquères N., Jany A., Jeschke D., Kobychev V., Korablev D., Korga G., Kornoukhov V., Kryn D., Lachenmaier T., Lasserre T., Laubenstein M., Litvinovich E., Lombardi F., Lombardi P., Ludhova L., Lukyanchenko G., Lukyanchenko L., Machulin I., Manuzio G., Marcocci S., Maricic J., Mention G., Martyn J., Meroni E., Meyer M., Miramonti L., Misiaszek M., Muratova V., Musenich R., Neumair B., Oberauer L., Opitz B., Ortica F., Pallavicini M., Papp L., Pilipenko N., Pocar A., Ranucci G., Razeto A., Re A., Romani A., Roncin R., Rossi N., Rottenanger S., Schönert S., Scola M., Semenov D., Skorokhvatov M., Smirnov O., Sotnikov A., Stokes L.F.F., Suvorov Y., Tartaglia R., Testera G., Thurn J., Toropova M., Unzhakov E., Veyssiére C., Vishneva A., Vivier M., Vogelaar R.B., von Feilitzsch F., Wang H., Weinz S., Wojcik M., Wurm M., Yokley Z., Zaimidoroga O., Zavatarelli S., Zuber K., and Zuzel G.

Subjects
Physics, QC1-999
Abstract

Borexino is a liquid scintillator detector sited underground in the Laboratori Nazionali del Gran Sasso (Italy). Its physics program, until the end of this year, is focussed on the study of solar neutrinos, in particular from the Beryllium, pp, pep and CNO fusion reactions. Knowing the reaction chains in the sun provides insights towards physics disciplines such as astrophysics (star physics, star formation, etc.), astroparticle and particle physics. Phase II started in 2011 and its aim is to improve the phase I results, in particular the measurements of the neutrino fluxes from the pep and CNO processes. By the end of this year, data taking from the sun will be over and a new project is scheduled to launch: Short distance Oscillation with boreXino (SOX), which uses a Cerium source for neutrinos (100÷150 kCi of activity) and aims to confirm or rule out the presence of sterile neutrinos. This particle is hypothesised to justify the reactor, Gallium and LSND anomalies found and can reject extensions to the standard model. The work presented is a summary of the solar neutrino results achieved so far, which lead not only to a precise study of the processes in the sun, but also to more Standard Model oriented measurements (such as the stability of the charge, i.e. the life time of the electron). Furthermore, the perspectives of the SOX program are discussed showing the experiment sensitivity to a fourth neutrino state covering almost entirely 3σ of the preferred region of the anomalous neutrino experiments, and additional applications of the detector such as the study of geo-neutrinos.

Published
2018
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2. Short distance neutrino oscillations with Borexino

Author

Caminata A., Agostini M., Altenmüller K., Appel S., Bellini G., Benziger J., Berton N., Bick D., Bonfini G., Bravo D., Caccianiga B., Calaprice F., Cavalcante P., Chepurnov A., Cribier M., D'Angelo D., Davini S., Derbin A., Noto L. di, Durero M., Empl A., Etenko A., Farinon S., Fischer V., Fomenko K., Franco D., Gabriele F., Gaffiot J., Galbiati C., Ghiano C., Giammarchi M., Göger-Neff M., Goretti A., Gromov M., Hagner C., Houdy Th., Hungerford E., Ianni Aldo, Ianni Andrea, Jonquères N., Kaiser M., Kobychev V., Korablev D., Korga G., Kryn D., Lachenmaier T., Lasserre T., Laubenstein M., Lehnert B., Link J., Litvinovich E., Lombardi F., Lombardi P., Ludhova L., Lukyanchenko G., Machulin I., Maneschg W., Marcocci S., Maricic J., Mention G., Meroni E., Meyer M., Miramonti L., Misiaszek M., Montuschi M., Muratova V., Musenich R., Neumair B., Oberauer L., Obolensky M., Ortica F., Pallavicini M., Papp L., Perasso L., Pocar A., Ranucci G., Razeto A., Re A., Romani A., Rossi N., Schönert S., Scola L., Simgen H., Skorokhvatov M., Smirnov O., Sotnikov A., Sukhotin S., Suvorov Y., Tartaglia R., Testera G., Veyssière C., Vivier M., Vogelaar R.B., Feilitzsch F. von, Wang H., Winter J., Wojcik M., Wurm M., Zaimidoroga O., Zavatarelli S., Zuber K., and Zuzel G.

Subjects
Physics, QC1-999
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 νe (or ν̅e) 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.

Published
2016
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3. First real–time detection of solar pp neutrinos by Borexino

Author

Pallavicini M., Bellini G., Benziger J., Bick D., Bonfini G., Bravo D., Caccianiga B., Calaprice F., Caminata A., Cavalcante P., Chavarria A., Chepurnov A., D'Angelo D., Davini S., Derbin A., Empl A., Etenko A., Fomenko K., Franco D., Gabriele F., Galbiati C., Gazzana S., Ghiano C., Giammarchi M., Göger-Neff M., Goretti A., Gromov M., Hagner C., Hungerford E., Ianni Al., Ianni An., Kayser M., Kobychev V., Korablëv D., Korga G., Kryn D., Laubenstein M., Lehnert B., Lewke T., Litvinovich E., Lombardi F., Lombardi P., Ludhova L., Lukyanchenko G., Machulin I., Manecki S., Maneschg W., Marcocci S., Meindl Q., Meroni E., Meyer M., Miramonti L., Misiaszek M., Montuschi M., Mosteiro P., Muratova V., Oberauer L., Obolensky M., Ortica F., Otis K., Papp L., Perasso L., Pocar A., Ranucci G., Razeto A., Re A., Romani A., Rossi N., Saldanha R., Salvo C., Schönert 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, Wang H., Winter J., Wojcik M., Wurm M., Zaimidoroga O., Zavatarelli S., Zuber K., and Zuzel G.

Subjects
Physics, QC1-999
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.

Published
2016
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4. Recent Borexino results and prospects for the near future

Author

D’Angelo D., Agostini M., Altenmüller K., Appel S., Bellini G., Benziger J., Bick D., Bonfini G., Bravo D., Caccianiga B., Calaprice F., Caminata A., Cavalcante P., Chepurnov A., Davini S., Derbin A., Di Noto L., Drachnev I., Etenko A., Fomenko K., Franco D., Gabriele F., Galbiati C., Ghiano C., Giammarchi M., Goeger-Neff M., Goretti A., Gromov M., Hagner C., Hungerford E., Ianni Aldo, Ianni Andrea, Jedrzejczak K., Kaiser M., Kobychev V., Korablev D., Korga G., Kryn D., Laubenstein M., Lehnert B., Litvinovich E., Lombardi F., Lombardi P., Ludhova L., Lukyanchenko G., Machulin I., Manecki S., Maneschg W., Marcocci S., Meroni E., Meyer M., Miramonti L., Misiaszek M., Montuschi M., Mosteiro P., Muratova V., Neumair B., Oberauer L., Obolensky M., Ortica F., Pallavicini M., Papp L., Perasso L., Pocar A., Ranucci G., Razeto A., Re A., Romani A., Roncin R., Rossi N., Schönert S., Semenov D., Simgen H., Skorokhvatov M., Smirnov O., Sotnikov A., Sukhotin S., Suvorov Y., Tartaglia R., Testera G., Thurn J., Toropova M., Unzhakov E., Vishneva A., Vogelaar R.B., von Feilitzsch F., Wang H., Weinz S., Winter J., Wojcik M., Wurm M., Yokley Z., Zaimidoroga O., Zavatarelli S., Zuber K., and Zuzel G.

Subjects
Physics, QC1-999
Abstract

The Borexino experiment located in the Gran Sasso National Laboratory, is an organic liquid scintillator detector conceived for the real time spectroscopy of low energy solar neutrinos. The phase-I of the data taking campaign (2007 – 2010) has allowed the first independent measurements of 7Be and pep solar neutrino fluxes as well as the first measurement of anti-neutrinos from the Earth. After a purification of the scintillator, Borexino is now in phase-II since 2011. Thanks to the unprecedented background levels, we have performed the first flux measurement of neutrinos from the fundamental pp reaction which powers the Sun. We review this breakthrough result and other recent results, including the latest review of our terrestrial neutrino analysis. We also discuss the upcoming measurements on middle energy solar neutrino spectral components (pep, CNO) and the new project SOX devoted to the study of sterile neutrinos via the use of a neutrino source placed in close proximity of the detector’s active material.

Published
2016
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5. Search for low-energy neutrinos from astrophysical sources with Borexino

Author

Agostini, M., Altenmüller, K., Appel, S., Atroshchenko, V., Bagdasarian, Z., Basilico, D., Bellini, G., Benziger, J., Bick, D., Bonfini, G., Bravo, D., Caccianiga, B., Calaprice, F., Caminata, A., Cappelli, L., Cavalcante, P., Cavanna, F., Chepurnov, A., Choi, K., D'Angelo, D., Davini, S., Derbin, A., Di Giacinto, A., Di Marcello, V., Ding, X. F., Di Ludovico, A., Di Noto, L., Drachnev, I., Formozov, A., Franco, D., Gabriele, F., Galbiati, C., Gschwender, M., Ghiano, C., Giammarchi, M., Goretti, A., Gromov, M., Guffanti, D., Hagner, C., Hungerford, E., Ianni, Aldo, Ianni, Andrea, Jany, A., Jeschke, D., Kumaran, S., Kobychev, V., Korga, G., Lachenmaier, T., Laubenstein, M., Litvinovich, E., Lombardi, P., Lomskaya, I., Ludhova, L., Lukyanchenko, G., Lukyanchenko, L., Machulin, I., Manuzio, G., Marcocci, S., Maricic, J., Martyn, J., Meroni, E., Meyer, M., Miramonti, L., Misiaszek, M., Muratova, V., Neumair, B., Nieslony, M., Oberauer, L., Orekhov, V., Ortica, F., Pallavicini, M., Papp, L., Penek, Ö., Pietrofaccia, L., Pilipenko, N., Pocar, A., Raikov, G., Ranalli, M. T., Ranucci, G., Razeto, A., Re, A., Redchuk, M., Romani, A., Rossi, N., Rottenanger, S., Schönert, S., Semenov, D., Skorokhvatov, M., Smirnov, O., Sotnikov, A., Suvorov, Y., Tartaglia, R., Testera, G., Thurn, J., Unzhakov, E., Vishneva, A., Vogelaar, R. B., von Feilitzsch, F., Wojcik, M., Wurm, M., Zaimidoroga, O., Zavatarelli, S., Zuber, K., and Zuzel, G.

Subjects
High Energy Physics - Experiment, Physics - Instrumentation and Detectors
Abstract

We report on searches for neutrinos and antineutrinos from astrophysical sources performed with the Borexino detector at the Laboratori Nazionali del Gran Sasso in Italy. Electron antineutrinos ($\bar{\nu}_e$) are detected in an organic liquid scintillator through the inverse $\beta$-decay reaction. In the present work we set model-independent upper limits in the energy range 1.8-16.8 MeV on neutrino fluxes from unknown sources that improve our previous results, on average, by a factor 2.5. Using the same data set, we first obtain experimental constraints on the diffuse supernova $\bar{\nu}_e$ fluxes in the previously unexplored region below 8 MeV. A search for $\bar{\nu}_e$ in the solar neutrino flux is also presented: the presence of $\bar{\nu}_e$ would be a manifestation of a non-zero anomalous magnetic moment of the neutrino, making possible its conversion to antineutrinos in the strong magnetic field of the Sun. We obtain a limit for a solar $\bar{\nu}_e$ flux of 384 cm$^{-2}$s$^{-1}$ (90% C.L.), assuming an undistorted solar $^{8}$B neutrinos energy spectrum, that corresponds to a transition probability $p_{ \nu_e \rightarrow \bar\nu_{e}}<$ 7.2$\times$10$^{-5}$ (90% C.L.) for E$_{\bar {\nu}_e}$ $>$ 1.8 MeV. At lower energies, by investigating the spectral shape of elastic scattering events, we obtain a new limit on solar $^{7}$Be-$\nu_e$ conversion into $\bar{\nu}_e$ of $p_{ \nu_e \rightarrow \bar \nu_{e}}<$ 0.14 (90% C.L.) at 0.862 keV. Last, we investigate solar flares as possible neutrino sources and obtain the strongest up-to-date limits on the fluence of neutrinos of all flavor neutrino below 3-7 ,MeV. Assuming the neutrino flux to be proportional to the flare's intensity, we exclude an intense solar flare as the cause of the observed excess of events in run 117 of the Cl-Ar Homestake experiment., Comment: 18 pages, 8 figures, 4 tables, 73 references

Published
2019

6. Comprehensive geoneutrino analysis with Borexino

Author

Agostini, M., Altenmüller, K., Appel, S., Atroshchenko, V., Bagdasarian, Z., Basilico, D., Bellini, G., Benziger, J., Bick, D., Bonfini, G., Bravo, D., Caccianiga, B., Calaprice, F., Caminata, A., Cappelli, L., Cavalcante, P., Cavanna, F., Chepurnov, A., Choi, K., D'Angelo, D., Davini, S., Derbin, A., Di Giacinto, A., Di Marcello, V., Ding, X. F., Di Ludovico, A., Di Noto, L., Drachnev, I., Fiorentini, G., Formozov, A., Franco, D., Gabriele, F., Galbiati, C., Gschwender, M., Ghiano, C., Giammarchi, M., Goretti, A., Gromov, M., Guffanti, D., Hagner, C., Hungerford, E., Ianni, Aldo, Ianni, Andrea, Jany, A., Jeschke, D., Kumaran, S., Kobychev, V., Korga, G., Lachenmaier, T., Lasserre, T., Laubenstein, M., Litvinovich, E., Lombardi, P., Lomskaya, I., Ludhova, L., Lukyanchenko, G., Lukyanchenko, L., Machulin, I., Mantovani, F., Manuzio, G., Marcocci, S., Maricic, J., Martyn, J., Meroni, E., Meyer, M., Miramonti, L., Misiaszek, M., Montuschi, M., Muratova, V., Neumair, B., Nieslony, M., Oberauer, L., Onillon, A., Orekhov, V., Ortica, F., Pallavicini, M., Papp, L., Penek, Ö., Pietrofaccia, L., Pilipenko, N., Pocar, A., Raikov, G., Ranalli, M. T., Ranucci, G., Razeto, A., Re, A., Redchuk, M., Ricci, B., Romani, A., Rossi, N., Rottenanger, S., Schönert, S., Semenov, D., Skorokhvatov, M., Smirnov, O., Sotnikov, A., Strati, V., Suvorov, Y., Tartaglia, R., Testera, G., Thurn, J., Unzhakov, E., Vishneva, A., Vivier, M., Vogelaar, R. B., von Feilitzsch, F., Wojcik, M., Wurm, M., Zaimidoroga, O., Zavatarelli, S., Zuber, K., and Zuzel, G.

Subjects
High Energy Physics - Experiment, Physics - Geophysics
Abstract

This paper presents a geoneutrino measurement using 3262.74 days of data taken with the Borexino detector at LNGS in Italy. By observing $52.6 ^{+9.4}_{-8.6} ({\rm stat}) ^{+2.7}_{-2.1}({\rm sys})$ geoneutrinos (68% interval) from $^{238}$U and $^{232}$Th, a signal of $47.0^{+8.4}_{-7.7}\,({\rm stat)}^{+2.4}_{-1.9}\,({\rm sys})$ TNU with $^{+18.3}_{-17.2}$% total precision was obtained. This result assumes the same Th/U mass ratio found in chondritic CI meteorites but compatible results were found when contributions from $^{238}$U and $^{232}$Th were fit as free parameters. Antineutrino background from reactors is fit unconstrained and found compatible with the expectations. The null-hypothesis of observing a signal from the mantle is excluded at a 99.0% C.L. when exploiting the knowledge of the local crust. Measured mantle signal of $21.2 ^{+9.6}_{-9.0} ({\rm stat})^{+1.1}_{-0.9} ({\rm sys})$ TNU corresponds to the production of a radiogenic heat of $24.6 ^{+11.1}_{-10.4}$ TW (68% interval) from $^{238}$U and $^{232}$Th in the mantle. Assuming 18% contribution of $^{40}$K in the mantle and $8.1^{+1.9}_{-1.4}$ TW of radiogenic heat of the lithosphere, the Borexino estimate of the total Earth radiogenic heat is $38.2 ^{+13.6}_{-12.7}$ TW, corresponding to a convective Urey ratio of 0.78$^{+0.41}_{-0.28}$. These values are compatible with different geological models, however there is a 2.4$\sigma$ tension with those which predict the lowest concentration of heat-producing elements. By fitting the data with a constraint on the reactor antineutrino background, the existence of a hypothetical georeactor at the center of the Earth having power greater than 2.4 TW at 95% C.L. is excluded. Particular attention is given to all analysis details, which should be of interest for the next generation geoneutrino measurements., Comment: 69 pages, 56 Figures (some composed of multiple files), 17 Tables, 135 References

Published
2019
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7. Constraints on Flavor-Diagonal Non-Standard Neutrino Interactions from Borexino Phase-II

Author

Agarwalla, S. K., Agostini, M., Altenmüller, K., Appel, S., Atroshchenko, V., Bagdasarian, Z., Basilico, D., Bellini, G., Benziger, J., Bick, D., Bonfini, G., Bravo, D., Caccianiga, B., Calaprice, F., Caminata, A., Cappelli, L., Cavalcante, P., Cavanna, F., Chepurnov, A., Choi, K., D'Angelo, D., Davini, S., Derbin, A., Di Giacinto, A., Di Marcello, V., Ding, X. F., Di Ludovico, A., Di Noto, L., Drachnev, I., Fomenko, K., Formozov, A., Franco, D., Gabriele, F., Galbiati, C., Gschwender, M., Ghiano, C., Giammarchi, M., Goretti, A., Gromov, M., Guffanti, D., Hagner, C., Hungerford, E., Ianni, Aldo, Ianni, Andrea, Jany, A., Jeschke, D., Kumaran, S., Kobychev, V., Korga, G., Lachenmaier, T., Laubenstein, M., Litvinovich, E., Lombardi, P., Ludhova, L., Lukyanchenko, G., Lukyanchenko, L., Machulin, I., Manuzio, G., Marcocci, S., Maricic, J., Martyn, J., Meroni, E., Meyer, M., Miramonti, L., Misiaszek, M., Muratova, V., Neumair, B., Nieslony, M., Oberauer, L., Orekhov, V., Ortica, F., Pallavicini, M., Papp, L., Penek, Ö., Pietrofaccia, L., Pilipenko, N., Pocar, A., Raikov, G., Ranucci, G., Razeto, A., Re, A., Redchuk, M., Romani, A., Rossi, N., Rottenanger, S., Schönert, S., Semenov, D., Skorokhvatov, M., Smirnov, O., Sotnikov, A., Sun, C., Suvorov, Y., Takeuchi, T., Tartaglia, R., Testera, G., Thurn, J., Unzhakov, E., Vishneva, A., Vogelaar, R. B., von Feilitzsch, F., Wojcik, M., Wurm, M., Zaimidoroga, O., Zavatarelli, S., Zuber, K., and Zuzel, G.

Subjects
High Energy Physics - Phenomenology, Astrophysics - Solar and Stellar Astrophysics, High Energy Physics - Experiment, Physics - Instrumentation and Detectors
Abstract

The Borexino detector measures solar neutrino fluxes via neutrino-electron elastic scattering. Observed spectra are determined by the solar-$\nu_{e}$ survival probability $P_{ee}(E)$, and the chiral couplings of the neutrino and electron. Some theories of physics beyond the Standard Model postulate the existence of Non-Standard Interactions (NSI's) which modify the chiral couplings and $P_{ee}(E)$. In this paper, we search for such NSI's, in particular, flavor-diagonal neutral current interactions that modify the $\nu_e e$ and $\nu_\tau e$ couplings using Borexino Phase II data. Standard Solar Model predictions of the solar neutrino fluxes for both high- and low-metallicity assumptions are considered. No indication of new physics is found at the level of sensitivity of the detector and constraints on the parameters of the NSI's are placed. In addition, with the same dataset the value of $\sin^2\theta_W$ is obtained with a precision comparable to that achieved in reactor antineutrino experiments., Comment: 28 pages, 7 figures. Slight modifications in the title, abstract, and conclusion. Few references added. Text expanded for clarity. Accepted in JHEP

Published
2019
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8. Modulations of the Cosmic Muon Signal in Ten Years of Borexino Data

Author

The Borexino Collaboration, Agostini, M., Altenmüller, K., Appel, S., Atroshchenko, V., Bagdasarian, Z., Basilico, D., Bellini, G., Benziger, J., Bick, D., Bolognino, I., Bonfini, G., Bravo, D., Caccianiga, B., Calaprice, F., Caminata, A., Caprioli, S., Carlini, M., Cavalcante, P., Cavanna, F., Chepurnov, A., Choi, K., Collica, L., D'Angelo, D., Davini, S., Derbin, A., Ding, X. F., Di Ludovico, A., Di Noto, L., Drachnev, I., Fomenko, K., Formozov, A., Franco, D., Gabriele, F., Galbiati, C., Gschwender, M., Ghiano, C., Giammarchi, M., Goretti, A., Gromov, M., Guffanti, D., Hagner, C., Houdy, T., Hungerford, E., Ianni, Aldo, Ianni, Andrea, Jany, A., Jeschke, D., Kobychev, V., Korablev, D., Korga, G., Kudryavtsev, V. A., Kumaran, S., Lachenmaier, T., Laubenstein, M., Litvinovich, E., Lombardi, F., Lombardi, P., Ludhova, L., Lukyanchenko, G., Lukyanchenko, L., Machulin, I., Manuzio, G., Marcocci, S., Maricic, J., Martyn, J., Meighen-Berger, S., Meroni, E., Meyer, M., Miramonti, L., Misiaszek, M., Muratova, V., Neumair, B., Nieslony, M., Oberauer, L., Opitz, B., Orekhov, V., Ortica, F., Pallavicini, M., Papp, L., Penek, Ö., Pietrofaccia, L., Pilipenko, N., Pocar, A., Porcelli, A., Raikov, G., Ranucci, G., Razeto, A., Re, A., Redchuk, M., Romani, A., Rossi, N., Rottenanger, S., Schönert, S., Semenov, D., Skorokhvatov, M., Smirnov, O., Sotnikov, A., Stokes, L. F. F., Suvorov, Y., Tartaglia, R., Testera, G., Thurn, J., Toropova, M., Unzhakov, E., Vishneva, A., Vogelaar, R. B., von Feilitzsch, F., Weinz, S., Wojcik, M., Wurm, M., Yokley, Z., Zaimidoroga, O., Zavatarelli, S., Zuber, K., and Zuzel, G.

Subjects
High Energy Physics - Experiment, Physics - Instrumentation and Detectors
Abstract

We have measured the flux of cosmic muons in the Laboratori Nazionali del Gran Sasso at 3800\,m\,w.e. to be $(3.432 \pm 0.003)\cdot 10^{-4}\,\mathrm{{m^{-2}s^{-1}}}$ based on ten years of Borexino data acquired between May 2007 and May 2017. A seasonal modulation with a period of $(366.3 \pm 0.6)\,\mathrm{d}$ and a relative amplitude of $(1.36 \pm0.04)\%$ is observed. The phase is measured to be $(181.7 \pm 0.4)\,\mathrm{d}$, corresponding to a maximum at the 1$^\mathrm{st}$ of July. Using data inferred from global atmospheric models, we show the muon flux to be positively correlated with the atmospheric temperature and measure the effective temperature coefficient $\alpha_\mathrm{T} = 0.90 \pm 0.02$. The origin of cosmic muons from pion and kaon decays in the atmosphere allows to interpret the effective temperature coefficient as an indirect measurement of the atmospheric kaon-to-pion production ratio $r_{\mathrm{K}/\pi} = 0.11^{+0.11}_{-0.07}$ for primary energies above $18\,\mathrm{TeV}$. We find evidence for a long-term modulation of the muon flux with a period of $\sim 3000\,\mathrm{d}$ and a maximum in June 2012 that is not present in the atmospheric temperature data. A possible correlation between this modulation and the solar activity is investigated. The cosmogenic neutron production rate is found to show a seasonal modulation in phase with the cosmic muon flux but with an increased amplitude of $(2.6 \pm 0.4)\%$., Comment: 30 pages, 16 figures, proofreading for publication in JCAP

Published
2018
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9. Speeding up complex multivariate data analysis in Borexino with parallel computing based on Graphics Processing Unit

Author

Ding, X. F., Agostini, M., Altenmuller, K., Appel, S., Atroshchenko, V., Bagdasarian, Z., Basilico, D., Bellini, G., Benziger, J., Bick, D., Bonfini, G., Bravo, D., Caccianiga, B., Calaprice, F., Caminata, A., Caprioli, S., Carlini, M., Cavalcante, P., Chepurnov, A., Choi, K., Collica, L., D'Angelo, D., Davini, S., Derbin, A., Di Ludovico, A., Di Noto, L., Drachnev, I., Fomenko, K., Formozov, A., Franco, D., Froborg, F., Gabriele, F., Galbiati, C., Ghiano, C., Giammarchi, M., Goretti, A., Gromov, M., Guffanti, D., Hagner, C., Houdy, T., Hungerford, E., Ianni, Aldo, Ianni, Andrea, Jany, A., Jeschke, D., Kobychev, V., Korablev, D., Korga, G., Kryn, D., Laubenstein, M., Litvinovich, E., Lombardi, F., Lombardi, P., Ludhova, L., Lukyanchenko, G., Lukyanchenko, L., Machulin, I., Manuzio, G., Marcocci, S., Martyn, J., Meroni, E., Meyer, M., Miramonti, L., Misiaszek, M., Muratova, V., Neumair, B., Oberauer, L., Opitz, B., Orekhov, V., Ortica, F., Pallavicini, M., Papp, L., Penek, O., Pilipenko, N., Pocar, A., Porcelli, A., Ranucci, G., Razeto, A., Re, A., Redchuk, M., Romani, A., Roncin, R., Rossi, N., Schonert, S., Semenov, D., Skorokhvatov, M., Smirnov, O., Sotnikov, A., Stokes, L. F. F., Suvorov, Y., Tartaglia, R., Testera, G., Thurn, J., Toropova, M., Unzhakov, E., Vishneva, A., Vogelaar, R. B., von Feilitzsch, F., Wang, H., Weinz, S., Wojcik, M., Wurm, M., Yokley, Z., Zaimidoroga, O., Zavatarelli, S., Zuber, K., and Zuzel, G.

Subjects
Physics - Data Analysis, Statistics and Probability, High Energy Physics - Experiment, Physics - Computational Physics
Abstract

A spectral fitter based on the graphics processor unit (GPU) has been developed for Borexino solar neutrino analysis. It is able to shorten the fitting time to a superior level compared to the CPU fitting procedure. In Borexino solar neutrino spectral analysis, fitting usually requires around one hour to converge since it includes time-consuming convolutions in order to account for the detector response and pile-up effects. Moreover, the convergence time increases to more than two days when including extra computations for the discrimination of $^{11}$C and external $\gamma$s. In sharp contrast, with the GPU-based fitter it takes less than 10 seconds and less than four minutes, respectively. This fitter is developed utilizing the GooFit project with customized likelihoods, pdfs and infrastructures supporting certain analysis methods. In this proceeding the design of the package, developed features and the comparison with the original CPU fitter are presented., Comment: 5 pages, 2 figures, proceeding for TAUP 2017 XV International Conference on Topics in Astroparticle and Underground Physics

Published
2018
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10. Simultaneous Precision Spectroscopy of $pp$, $^7$Be, and $pep$ Solar Neutrinos with Borexino Phase-II

Author

Agostini, M., Altenmuller, K., Appel, S., Atroshchenko, V., Bagdasarian, Z., Basilico, D., Bellini, G., Benziger, J., Bick, D., Bonfini, G., Bravo, D., Caccianiga, B., Calaprice, F., Caminata, A., Caprioli, S., Carlini, M., Cavalcante, P., Chepurnov, A., Choi, K., Collica, L., D'Angelo, D., Davini, S., Derbin, A., Ding, X. F., Di Ludovico, A., Di Noto, L., Drachnev, I., Fomenko, K., Formozov, A., Franco, D., Froborg, F., Gabriele, F., Galbiati, C., Ghiano, C., Giammarchi, M., Goretti, A., Gromov, M., Guffanti, D., Hagner, C., Houdy, T., Hungerford, E., Ianni, Aldo, Ianni, Andrea, Jany, A., Jeschke, D., Kobychev, V., Korablev, D., Korga, G., Kryn, D., Laubenstein, M., Litvinovich, E., Lombardi, F., Lombardi, P., Ludhova, L., Lukyanchenko, G., Lukyanchenko, L., Machulin, I., Manuzio, G., Marcocci, S., Martyn, J., Meroni, E., Meyer, M., Miramonti, L., Misiaszek, M., Muratova, V., Neumair, B., Oberauer, L., Opitz, B., Orekhov, V., Ortica, F., Pallavicini, M., Papp, L., Penek, O., Pilipenko, N., Pocar, A., Porcelli, A., Ranucci, G., Razeto, A., Re, A., Redchuk, M., Romani, A., Roncin, R., Rossi, N., Schonert, S., Semenov, D., Skorokhvatov, M., Smirnov, O., Sotnikov, A., Stokes, L. F. F., Suvorov, Y., Tartaglia, R., Testera, G., Thurn, J., Toropova, M., Unzhakov, E., Vishneva, A., Vogelaar, R. B., von Feilitzsch, F., Wang, H., Weinz, S., Wojcik, M., Wurm, M., Yokley, Z., Zaimidoroga, O., Zavatarelli, S., Zuber, K., and Zuzel, G.

Subjects
High Energy Physics - Experiment, Astrophysics - Solar and Stellar Astrophysics
Abstract

We present the first simultaneous measurement of the interaction rates of $pp$, $^7$Be, and $pep$ solar neutrinos performed with a global fit to the Borexino data in an extended energy range (0.19-2.93)$\,$MeV. This result was obtained by analyzing 1291.51$\,$days of Borexino Phase-II data, collected between December 2011 and May 2016 after an extensive scintillator purification campaign. We find: rate($pp$)$\,$=$\,$$134$$\,$$\pm$$\,$$10$$\,$($stat$)$\,$$^{\rm +6}_{\rm -10}$$\,$($sys$)$\,$cpd/100$\,$t, rate($^7$Be)$\,$=$\,$$48.3$$\,$$\pm$$\,$$1.1$$\,$($stat$)$\,$$^{\rm +0.4}_{\rm -0.7}$$\,$($sys$)$\,$cpd/100$\,$t, and rate($pep$)$\,$=$\,$$2.43$$\pm$$\,$$0.36$$\,$($stat$)$^{+0.15}_{-0.22}$$\,$($sys$)$\,$cpd/100$\,$t. These numbers are in agreement with and improve the precision of our previous measurements. In particular, the interaction rate of $^7$Be $\nu$'s is measured with an unprecedented precision of 2.7%, showing that discriminating between the high and low metallicity solar models is now largely dominated by theoretical uncertainties. The absence of $pep$ neutrinos is rejected for the first time at more than 5$\,$$\sigma$. An upper limit of $8.1$$\,$cpd/100$\,$t (95%$\,$C.L.) on the CNO neutrino rate is obtained by setting an additional constraint on the ratio between the $pp$ and $pep$ neutrino rates in the fit. This limit has the same significance as that obtained by the Borexino Phase-I (currently providing the tightest bound on this component), but is obtained by applying a less stringent constraint on the $pep$ $\nu$ flux., Comment: 8 pages, 7 figures

Published
2017
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11. Limiting neutrino magnetic moments with Borexino Phase-II solar neutrino data

Author

Agostini, M., Altenmüller, K., Appel, S., Atroshchenko, V., Bagdasarian, Z., Basilico, D., Bellini, G., Benziger, J., Bick, D., Bonfini, G., Bravo, D., Caccianiga, B., Calaprice, F., Caminata, A., Caprioli, S., Carlini, M., Cavalcante, P., Chepurnov, A., Choi, K., Collica, L., D'Angelo, D., Davini, S., Derbin, A., Ding, X. F., Di Ludovico, A., Di Noto, L., Drachnev, I., Fomenko, K., Formozov, A., Franco, D., Froborg, F., Gabriele, F., Galbiati, C., Ghiano, C., Giammarchi, M., Goretti, A., Gromov, M., Guffanti, D., Hagner, C., Houdy, T., Hungerford, E., Ianni, Aldo, Ianni, Andrea, Jany, A., Jeschke, D., Kobychev, V., Korablev, D., Korga, G., Kryn, D., Laubenstein, M., Litvinovich, E., Lombardi, F., Lombardi, P., Ludhova, L., Lukyanchenko, G., Lukyanchenko, L., Machulin, I., Manuzio, G., Marcocci, S., Martyn, J., Meroni, E., Meyer, M., Miramonti, L., Misiaszek, M., Muratova, V., Neumair, B., Oberauer, L., Opitz, B., Orekhov, V., Ortica, F., Pallavicini, M., Papp, L., Penek, Ö., Pilipenko, N., Pocar, A., Porcelli, A., Ranucci, G., Razeto, A., Re, A., Redchuk, M., Romani, A., Roncin, R., Rossi, N., Schönert, S., Semenov, D., Skorokhvatov, M., Smirnov, O., Sotnikov, A., Stokes, L. F. F., Suvorov, Y., Tartaglia, R., Testera, G., Thurn, J., Toropova, M., Unzhakov, E., Vishneva, A., Vogelaar, R. B., von Feilitzsch, F., Wang, H., Weinz, S., Wojcik, M., Wurm, M., Yokley, Z., Zaimidoroga, O., Zavatarelli, S., Zuber, K., and Zuzel, G.

Subjects
High Energy Physics - Experiment, High Energy Physics - Phenomenology
Abstract

A search for the solar neutrino effective magnetic moment has been performed using data from 1291.5 days exposure during the second phase of the Borexino experiment. No significant deviations from the expected shape of the electron recoil spectrum from solar neutrinos have been found, and a new upper limit on the effective neutrino magnetic moment of $\mu_{\nu}^{eff}$ $<$ 2.8$\cdot$10$^{-11}$ $\mu_{B}$ at 90\% c.l. has been set using constraints on the sum of the solar neutrino fluxes implied by the radiochemical gallium experiments.Using the limit for the effective neutrino moment, new limits for the magnetic moments of the neutrino flavor states, and for the elements of the neutrino magnetic moments matrix for Dirac and Majorana neutrinos, are derived., Comment: 7 pages, 2 figures

Published
2017
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12. A search for low-energy neutrinos correlated with gravitational wave events GW150914, GW151226 and GW170104 with the Borexino detector

Author

Agostini, M., Altenmuller, K., Appel, S., Atroshchenko, V., Bagdasarian, Z., Basilico, D., Bellini, G., Benziger, J., Bick, D., Bonfini, G., Bravo, D., Caccianiga, B., Calaprice, F., Caminata, A., Caprioli, S., Carlini, M., Cavalcante, P., Chepurnov, A., Choi, K., D'Angelo, D., Davini, S., Derbin, A., Ding, X. F., Di Ludovico, A., Di Noto, L., Drachnev, I., Fomenko, K., Formozov, A., Franco, D., Froborg, F., Gabriele, F., Galbiati, C., Ghiano, C., Giammarchi, M., Goretti, A., Gromov, M., Hagner, C., Houdy, T., Hungerford, E., Ianni, Aldo, Ianni, Andrea, Jany, A., Jeschke, D., Kobychev, V., Korablev, D., Korga, G., Kryn, D., Laubenstein, M., Litvinovich, E., Lombardi, F., Lombardi, P., Ludhova, L., Lukyanchenko, G., Lukyanchenko, L., Machulin, I., Manuzio, G., Marcocci, S., Martyn, J., Meroni, E., Meyer, M., Miramonti, L., Misiaszek, M., Muratova, V., Neumair, B., Oberauer, L., Opitz, B., Ortica, F., Pallavicini, M., Papp, L., Pilipenko, N., Pocar, A., Porcelli, A., Ranucci, G., Razeto, A., Re, A., Romani, A., Roncin, R., Rossi, N., Schonert, S., Semenov, D., Skorokhvatov, M., Smirnov, O., Sotnikov, A., Stokes, L. F. F., Suvorov, Y., Tartaglia, R., Testera, G., Thurn, J., Toropova, M., Unzhakov, E., Vishneva, A., Vogelaar, R. B., von Feilitzsch, F., Wang, H., Weinz, S., Wojcik, M., Wurm, M., Yokley, Z., Zaimidoroga, O., Zavatarelli, S., Zuber, K., and Zuzel, G.

Subjects
Astrophysics - High Energy Astrophysical Phenomena, High Energy Physics - Experiment, High Energy Physics - Phenomenology
Abstract

We present the results of a low-energy neutrino search using the Borexino detector in coincidence with the gravitational wave (GW) events GW150914, GW151226 and GW170104. We searched for correlated neutrino events with energies greater than 250 keV within a time window of $\pm500$ s centered around the GW detection time. A total of five candidates were found for all three GW150914, GW151226 and GW170104. This is consistent with the number of expected solar neutrino and background events. As a result, we have obtained the best current upper limits on the GW event neutrino fluence of all flavors ($\nu_e, \nu_{\mu}, \nu_{\tau}$) in the energy range $(0.5 - 5.0)$ MeV., Comment: 8 pages, 5 figures

Published
2017
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13. The Monte Carlo simulation of the Borexino detector

Author

Agostini, M., Altenmuller, K., Appel, S., Atroshchenko, V., Bagdasarian, Z., Basilico, D., Bellini, G., Benziger, J., Bick, D., Bonfini, G., Borodikhina, L., Bravo, D., Caccianiga, B., Calaprice, F., Caminata, A., Caprioli, S., Carlini, M., Cavalcante, P., Chepurnov, A., Choi, K., D'Angelo, D., Davini, S., Derbin, A., Ding, X. F., Di Noto, L., Drachnev, I., Fomenko, K., Formozov, A., Franco, D., Froborg, F., Gabriele, F., Galbiati, C., Ghiano, C., Giammarchi, M., Goeger-Neff, M., Goretti, A., Gromov, M., Hagner, C., Houdy, T., Hungerford, E., Ianni, Aldo, Ianni, Andrea, Jany, A., Jeschke, D., Kobychev, V., Korablev, D., Korga, G., Kryn, D., Laubenstein, M., Litvinovich, E., Lombardi, F., Lombardi, P., Ludhova, L., Lukyanchenko, G., Machulin, I., Manuzio, G., Marcocci, S., Martyn, J., Meroni, E., Meyer, M., Miramonti, L., Misiaszek, M., Muratova, V., Neumair, B., Oberauer, L., Opitz, B., Ortica, F., Pallavicini, M., Papp, L., Pocar, A., Ranucci, G., Re, A., Romani, A., Roncin, R., Rossi, N., Schonert, S., Semenov, D., Shakina, P., Skorokhvatov, M., Smirnov, O., Sotnikov, A., Stokes, L. F. F., Suvorov, Y., Tartaglia, R., Testera, G., Thurn, J., Toropova, M., Unzhakov, E., Vishneva, A., Vogelaar, R. B., von Feilitzsch, F., Wang, H., Weinz, S., Wojcik, M., Wurm, M., Yokley, Z., Zaimidoroga, O., Zavatarelli, S., Zuber, K., and Zuzel, G.

Subjects
Physics - Instrumentation and Detectors, High Energy Physics - Experiment
Abstract

We describe the Monte Carlo (MC) simulation package of the Borexino detector and discuss the agreement of its output with data. The Borexino MC 'ab initio' simulates the energy loss of particles in all detector components and generates the resulting scintillation photons and their propagation within the liquid scintillator volume. The simulation accounts for absorption, reemission, and scattering of the optical photons and tracks them until they either are absorbed or reach the photocathode of one of the photomultiplier tubes. Photon detection is followed by a comprehensive simulation of the readout electronics response. The algorithm proceeds with a detailed simulation of the electronics chain. The MC is tuned using data collected with radioactive calibration sources deployed inside and around the scintillator volume. The simulation reproduces the energy response of the detector, its uniformity within the fiducial scintillator volume relevant to neutrino physics, and the time distribution of detected photons to better than 1% between 100 keV and several MeV. The techniques developed to simulate the Borexino detector and their level of refinement are of possible interest to the neutrino community, especially for current and future large-volume liquid scintillator experiments such as Kamland-Zen, SNO+, and Juno.

Published
2017
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14. Seasonal Modulation of the $^7$Be Solar Neutrino Rate in Borexino

Author

Agostini, M., Altenmuller, K., Appel, S., Atroshchenko, V., Basilico, D., Bellini, G., Benziger, J., Bick, D., Bonfini, G., Borodikhina, L., Bravo, D., Caccianiga, B., Calaprice, F., Caminata, A., Caprioli, S., Carlini, M., Cavalcante, P., Chepurnov, A., Choi, K., D'Angelo, D., Davini, S., Derbin, A., Ding, X. F., Di Noto, L., Drachnev, I., Fomenko, K., Franco, D., Froborg, F., Gabriele, F., Galbiati, C., Ghiano, C., Giammarchi, M., Goeger-Neff, M., Goretti, A., Gromov, M., Hagner, C., Houdy, T., Hungerford, E., Ianni, Aldo, Ianni, Andrea, Jany, A., Jeschke, D., Kobychev, V., Korablev, D., Korga, G., Kryn, D., Laubenstein, M., Lehnert, B., Litvinovich, E., Lombardi, F., Lombardi, P., Ludhova, L., Lukyanchenko, G., Machulin, I., Manecki, S., Manuzio, G., Marcocci, S., Martyn, J., Meroni, E., Meyer, M., Miramonti, L., Misiaszek, M., Montuschi, M., Muratova, V., Neumair, B., Oberauer, L., Opitz, B., Ortica, F., Pallavicini, M., Papp, L., Pocar, A., Ranucci, G., Razeto, A., Re, A., Romani, A., Roncin, R., Rossi, N., Schonert, S., Semenov, D., Shakina, P., Skorokhvatov, M., Smirnov, O., Sotnikov, A., Stokes, L. F. F., Suvorov, Y., Tartaglia, R., Testera, G., Thurn, J., Toropova, M., Unzhakov, E., Vishneva, A., Vogelaar, R. B., von Feilitzsch, F., Wang, H., Weinz, S., Wojcik, M., Wurm, M., Yokley, Z., Zaimidoroga, O., Zavatarelli, S., Zuber, K., and Zuzel, G.

Subjects
High Energy Physics - Experiment, Physics - Instrumentation and Detectors
Abstract

We detected the seasonal modulation of the $^7$Be neutrino interaction rate with the Borexino detector at the Laboratori Nazionali del Gran Sasso in Italy. The period, amplitude, and phase of the observed time evolution of the signal are consistent with its solar origin, and the absence of an annual modulation is rejected at 99.99\% C.L. The data are analyzed using three methods: the sinusoidal fit, the Lomb-Scargle and the Empirical Mode Decomposition techniques, which all yield results in excellent agreement., Comment: 11 palese, 13 figures

Published
2017
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15. A search for low-energy neutrino and antineutrino signals correlated with gamma-ray bursts with Borexino

Author

Agostini, M., Altenmeuller, K., Appel, S., Atroshchenko, V., Bellini, G., Benziger, J., Bick, D., Bonfini, G., Bravo, D., Caccianiga, B., Calaprice, F., Caminata, A., Carlini, M., Cavalcante, P., Chepurnov, A., Choi, K., D'Angelo, D., Davini, S., de Kerret, H., Derbin, A., Di Noto, L., Drachnev, I., Etenko, A., Fomenko, K., Franco, D., Gabriele, F., Galbiati, C., Ghiano, C., Giammarchi, M., Goeger-Neff, M., Goretti, A., Gromov, M., Hagner, C., Hungerford, E., Ianni, Aldo, Ianni, Andrea, Jany, A., Jedrzejczak, K., Jeschke, D., Kobychev, V., Korablev, D., Korga, G., Kryn, D., Laubenstein, M., Lehnert, B., Litvinovich, E., Lombardi, F., Lombardi, P., Ludhova, L., Lukyanchenko, G., Machulin, I., Manecki, S., Maneschg, W., Manuzio, G., Marcocci, S., Meroni, E., Meyer, M., Miramonti, L., Misiaszek, M., Montuschi, M., Mosteiro, P., Muratova, V., Neumair, B., Oberauer, L., Obolensky, M., Ortica, F., Pallavicini, M., Papp, L., Pocar, A., Ranucci, G., Razeto, A., Re, A., Romani, A., Roncin, R., Rossi, N., Scheonert, S., Semenov, D., Skorokhvatov, M., Smirnov, O., Sotnikov, A., Sukhotin, S., Suvorov, Y., Tartaglia, R., Testera, G., Thurn, J., Toropova, M., Unzhakov, E., Vishneva, A., Vogelaar, R. B., von Feilitzsch, F., Wang, H., Weinz, S., Winter, J., Wojcik, M., Wurm, M., Yokley, Z., Zaimidoroga, O., Zavatarelli, S., Zuber, K., and Zuzel, G.

Subjects
Astrophysics - High Energy Astrophysical Phenomena
Abstract

A search for neutrino and antineutrino events correlated with 2,350 gamma-ray bursts (GRBs) is performed with Borexino data collected between December 2007 and November 2015. No statistically significant excess over background is observed. We look for electron antineutrinos ($\bar{\nu}_e$) that inverse beta decay on protons with energies from 1.8\,MeV to 15\,MeV and set the best limit on the neutrino fluence from GRBs below 8\,MeV. The signals from neutrinos and antineutrinos from GRBs that scatter on electrons are also searched for, a detection channel made possible by the particularly radio-pure scintillator of Borexino. We obtain currently the best limits on the neutrino fluence of all flavors and species below 7\,MeV. Finally, time correlations between GRBs and bursts of events are investigated. Our analysis combines two semi-independent data acquisition systems for the first time: the primary Borexino readout optimized for solar neutrino physics up to a few MeV, and a fast waveform digitizer system tuned for events above 1\,MeV., Comment: 10 pages, 6 figures

Published
2016
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16. The Main Results of the Borexino Experiment

Author

Derbin, A., Muratova, V., Agostini, M., Altenmuller, K., Appel, S., Bellini, G., Benziger, J., Bick, D., Bonfini, G., Bravo, D., Caccianiga, B., Calaprice, F., Caminata, A., Carlini, M., Cavalcante, P., Chepurnov, A., D'Angelo, D., Davini, S., Di Noto, L., Drachnev, I., Etenko, A., Fomenko, K., Formozov, A., Franco, D., Gabriele, F., Galbiati, C., Ghiano, C., Giammarchi, M., Goeger-Neff, M., Goretti, A., Gromov, M., Hagner, C., Hungerford, E., Ianni, Aldo, Ianni, Andrea, Jedrzejczak, K., Jeschke, D., Kaiser, M., Kobychev, V., Korablev, D., Korga, G., Kryn, D., Laubenstein, M., Lehnert, B., Litvinovich, E., Lombardi, F., Lombardi, P., Ludhova, L., Lukyanchenko, G., Machulin, I., Manecki, S., Maneschg, W., Marcocci, S., Meroni, E., Meyer, M., Miramonti, L., Misiaszek, M., Montuschi, M., Mosteiro, P., Neumair, B, Oberauer, L., Obolensky, M., Ortica, F., Pallavicini, M., Papp, L., Perasso, L., Pocar, A., Ranucci, G., Razeto, A., Re, A., Romani, A., Roncin, R., Rossi, N., Schonert, S., Semenov, D., Simgen, H., Skorokhvatov, M., Smirnov, O., Sotnikov, A., Sukhotin, S., Suvorov, Y., Tartaglia, R., Testera, G., Thurn, J., Toropova, M., Unzhakov, E., Vishneva, A., Vogelaar, R. B., von Feilitzsch, F., Wang, H., Weinz, S., Winter, J., Wojcik, M., Wurm, M., Yokley, Z., Zaimidoroga, O., Zavatarelli, S., Zuber, K., and Zuzel, G.

Subjects
High Energy Physics - Experiment, High Energy Physics - Phenomenology, Physics - Instrumentation and Detectors
Abstract

The main physical results on the registration of solar neutrinos and the search for rare processes obtained by the Borexino collaboration to date are presented., Comment: 8 pages, 8 figgures, To be published as Proceedings of the Third Annual Large Hadron Collider Physics Conference, St. Petersburg, Russia, 2015

Published
2016

17. Search for low-energy neutrinos from astrophysical sources with Borexino

Author

Agostini, M., Altenmüller, K., Appel, S., Atroshchenko, V., Bagdasarian, Z., Basilico, D., Bellini, G., Benziger, J., Bick, D., Bonfini, G., Bravo, D., Caccianiga, B., Calaprice, F., Caminata, A., Cappelli, L., Cavalcante, P., Cavanna, F., Chepurnov, A., Choi, K., D’Angelo, D., Davini, S., Derbin, A., Di Giacinto, A., Di Marcello, V., Ding, X.F., Di Ludovico, A., Di Noto, L., Drachnev, I., Formozov, A., Franco, D., Gabriele, F., Galbiati, C., Gschwender, M., Ghiano, C., Giammarchi, M., Goretti, A., Gromov, M., Guffanti, D., Hagner, C., Hungerford, E., Ianni, Aldo, Ianni, Andrea, Jany, A., Jeschke, D., Kumaran, S., Kobychev, V., Korga, G., Lachenmaier, T., Laubenstein, M., Litvinovich, E., Lombardi, P., Lomskaya, I., Ludhova, L., Lukyanchenko, G., Lukyanchenko, L., Machulin, I., Manuzio, G., Marcocci, S., Maricic, J., Martyn, J., Meroni, E., Meyer, M., Miramonti, L., Misiaszek, M., Muratova, V., Neumair, B., Nieslony, M., Oberauer, L., Orekhov, V., Ortica, F., Pallavicini, M., Papp, L., Penek, Ö., Pietrofaccia, L., Pilipenko, N., Pocar, A., Raikov, G., Ranalli, M.T., Ranucci, G., Razeto, A., Re, A., Redchuk, M., Ricci, B., Romani, A., Rossi, N., Rottenanger, S., Schönert, S., Semenov, D., Skorokhvatov, M., Smirnov, O., Sotnikov, A., Suvorov, Y., Tartaglia, R., Testera, G., Thurn, J., Unzhakov, E., Vishneva, A., Vogelaar, R.B., von Feilitzsch, F., Wojcik, M., Wurm, M., Zaimidoroga, O., Zavatarelli, S., Zuber, K., and Zuzel, G.

Published
2021
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18. A test of electric charge conservation with Borexino

Author

Borexino Collaboration, Agostini, M., Appel, S., Bellini, G., Benziger, J., Bick, D., Bonfini, G., Bravo, D., Caccianiga, B., Calaprice, F., Caminata, A., Cavalcante, P., Chepurnov, A., D'Angelo, D., Davini, S., Derbin, A., Di Noto, L., Drachnev, I., Empl, A., Etenko, A., Fomenko, K., Franco, D., Gabriele, F., Galbiati, C., Ghiano, C., Giammarchi, M., Goeger-Neff, M., Goretti, A., Gromov, M., Hagner, C., Hungerford, E., Ianni, Aldo, Ianni, Andrea, Jedrzejczak, K., Kaiser, M., Kobychev, V., Korablev, D., Korga, G., Kryn, D., Laubenstein, M., Lehnert, B., Litvinovich, E., Lombardi, F., Lombardi, P., Ludhova, L., Lukyanchenko, G., Machulin, I., Manecki, S., Maneschg, W., Marcocci, S., Meroni, E., Meyer, M., Miramonti, L., Misiaszek, M., Montuschi, M., Mosteiro, P., Muratova, V., Neumair, B., Oberauer, L., Obolensky, M., Ortica, F., Otis, K., Pallavicini, M., Papp, L., Perasso, L., Pocar, A., Ranucci, G., Razeto, A., Re, A., Romani, A., Roncin, R., Rossi, N., Schoenert, S., Semenov, D., Simgen, H., Skorokhvatov, M., Smirnov, O., Sotnikov, A., Sukhotin, S., Suvorov, Y., Tartaglia, R., Testera, G., Thurn, J., Toropova, M., Unzhakov, E., Vishneva, A., Vogelaar, R. B., von Feilitzsch, F., Wang, H., Weinz, S., Winter, J., Wojcik, M., Wurm, M., Yokley, Z., Zaimidoroga, O., Zavatarelli, S., Zuber, K., and Zuzel, G.

Subjects
High Energy Physics - Experiment, Physics - Instrumentation and Detectors
Abstract

Borexino is a liquid scintillation detector located deep underground at the Laboratori Nazionali del Gran Sasso (LNGS, Italy). Thanks to the unmatched radio-purity of the scintillator, and to the well understood detector response at low energy, a new limit on the stability of the electron for decay into a neutrino and a single mono-energetic photon was obtained. This new bound, tau > 6.6 10**28 yr at 90 % C.L., is two orders of magnitude better than the previous limit., Comment: 5 pages, 1 figure

Published
2015
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19. Low-energy (anti)neutrino physics with Borexino: Neutrinos from the primary proton-proton fusion process in the Sun

Author

Mosteiro, P., Bellini, G., Benziger, J., Bick, D., Bonfini, G., Bravo, D., Caccianiga, B., Cadonati, L., Calaprice, F., Caminata, A., Cavalcante, P., Chavarria, A., Chepurnov, A., D'Angelo, D., Davini, S., Derbin, A., Empl, A., Etenko, A., Fomenko, K., Franco, D., Gabriele, F., Galbiati, C., Gazzana, S., Ghiano, C., Giammarchi, M., Goeger-Neff, M., Goretti, A., Gromov, M., Hagner, C., Hungerford, E., Ianni, Al., Ianni, An., Kobychev, V., Korablev, D., Korga, G., Kryn, D., Laubenstein, M., Lehnert, B., Lewke, T., Litvinovich, E., Lombardi, F., Lombardi, P., Ludhova, L., Lukyanchenko, G., Machulin, I., Manecki, S., Maneschg, W., Marcocci, S., Meindl, Q., Meroni, E., Meyer, M., Miramonti, L., Misiaszek, M., Montuschi, M., Muratova, V., Oberauer, L., Obolensky, M., Ortica, F., Otis, K., Pallavicini, M., Papp, L., Perasso, L., Pocar, A., Ranucci, G., Razeto, A., Re, A., Romani, A., Rossi, N., Saldanha, R., Salvo, C., Schoenert, S., Simgen, H., Skorokhvatov, M., Smirnov, O., Sotnikov, A., Sukhotin, S., Suvorov, Y., Tartaglia, R., Testera, G., Vignaud, D., Vogelaar, R. B., von Feilitzsch, F., Wang, H., Winter, J., Wojcik, M., Wright, A., Wurm, M., Zaimidoroga, O., Zavatarelli, S., Zuber, K., and Zuzel, G.

Subjects
High Energy Physics - Experiment, Astrophysics - Solar and Stellar Astrophysics, Nuclear Experiment, Physics - Instrumentation and Detectors
Abstract

The Sun is fueled by a series of nuclear reactions that produce the energy that makes it shine. The primary reaction is the fusion of two protons into a deuteron, a positron and a neutrino. These neutrinos constitute the vast majority of neutrinos reaching Earth, providing us with key information about what goes on at the core of our star. Several experiments have now confirmed the observation of neutrino oscillations by detecting neutrinos from secondary nuclear processes in the Sun; this is the first direct spectral measurement of the neutrinos from the keystone proton-proton fusion. This observation is a crucial step towards the completion of the spectroscopy of pp-chain neutrinos, as well as further validation of the LMA-MSW model of neutrino oscillations., Comment: Proceedings from NOW (Neutrino Oscillation Workshop) 2014

Published
2015
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20. Measurement of neutrino flux from the primary proton--proton fusion process in the Sun with Borexino detector

Author

Smirnov, O. Y., Agostini, M., Appel, S., Bellini, G., Benziger, J., Bick, D., Bonfini, G., Bravo, D., Caccianiga, B., Calaprice, F., Caminata, A., Cavalcante, P., Chepurnov, A., Choi, K., D'Angelo, D., Davini, S., Derbin, A., Di Noto, L., Drachnev, I., Empl, A., Etenko, A., Fomenko, K., Franco, D., Gabriele, F., Galbiati, C., Ghiano, C., Giammarchi, M., Goeger-Neff, M., Goretti, A., Gromov, M., Hagner, C., Hungerford, E., Ianni, Aldo, Ianni, Andrea, Jedrzejczak, K., Kaiser, M., Kobychev, V., Korablev, D., Korga, G., Kryn, D., Laubenstein, M., Lehnert, B., Litvinovich, E., Lombardi, F., Lombardi, P., Ludhova, L., Lukyanchenko, G., Machulin, I., Manecki, S., Maneschg, W., Marcocci, S., Meroni, E., Meyer, M., Miramonti, L., Misiaszek, M., Mosteiro, P., Muratova, V., Neumair, B., Oberauer, L., Obolensky, M., Ortica, F., Otis, K., Pagani, L., Pallavicini, M., Papp, L., Perasso, L., Pocar, A., Ranucci, G., Razeto, A., Re, A., Romani, A., Roncin, R., Rossi, N., Schönert, S., Semenov, D., Simgen, H., Skorokhvatov, M., Sotnikov, A., Sukhotin, S., Suvorov, Y., Tartaglia, R., Testera, G., Thurn, J., Toropova, M., Unzhakov, E., Vogelaar, R. B., von Feilitzsch, F., Wang, H., Weinz, S., Winter, J., Wojcik, M., Wurm, M., Yokley, Z., Zaimidoroga, O., Zavatarelli, S., Zuber, K., and Zuzel, G.

Subjects
High Energy Physics - Experiment, Nuclear Experiment, Physics - Instrumentation and Detectors
Abstract

Neutrino produced in a chain of nuclear reactions in the Sun starting from the fusion of two protons, for the first time has been detected in a real-time detector in spectrometric mode. The unique properties of the Borexino detector provided an oppurtunity to disentangle pp-neutrino spectrum from the background components. A comparison of the total neutrino flux from the Sun with Solar luminosity in photons provides a test of the stability of the Sun on the 10$^{5}$ years time scale, and sets a strong limit on the power production in the unknown energy sources in the Sun of no more than 4\% of the total energy production at 90\% C.L., Comment: 15 pages, 2 tables, 3 figures

Published
2015
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21. Spectroscopy of geo-neutrinos from 2056 days of Borexino data

Author

Borexino collaboration, Agostini, M., Appel, S., Bellini, G., Benziger, J., Bick, D., Bonfini, G., Bravo, D., Caccianiga, B., Calaprice, F., Caminata, A., Cavalcante, P., Chepurnov, A., Choi, K., DAngelo, D., Davini, S., Derbin, A., Di Noto, L., Drachnev, I., Empl, A., Etenko, A., Fiorentini, G., Fomenko, K., Franco, D., Gabriele, F., Galbiati, C., Ghiano, C., Giammarchi, M., Goger-Neff, M., Goretti, A., Gromov, M., Hagner, C., Hungerford, E., Ianni, Aldo, Ianni, Andrea, Jedrzejczak, K., Kaiser, M., Kobychev, V., Korablev, D., Korga, G., Kryn, D., Laubenstein, M., Lehnert, B., Litvinovich, E., Lombardi, F., Lombardi, P., Ludhova, L., Lukyanchenko, G., Machulin, I., Manecki, S., Maneschg, W., Mantovani, F., Marcocci, S., Meroni, E., Meyer, M., Miramonti, L., Misiaszek, M., Montuschi, M., Mosteiro, P., Muratova, V., Oberauer, L., Obolensky, M., Ortica, F., Otis, K., Pagani, L., Pallavicini, M., Papp, L., Perasso, L., Perasso, S., Pocar, A., Ranucci, G., Razeto, A., Re, A., Ricci, B., Romani, A., Roncin, R., Rossi, N., Schoenert, S., Semenov, D., Simgen, H., Skorokhavatov, M., Smirnov, O., Sotnikov, A., Sukhotin, S., Suvorov, Y., Tartaglia, R., Testera, G., Thurn, J., Toropova, M., Unzhakov, E., Vogelaar, R. B., von Feilitzsch, F., Wang, H., Weinz, S., Winter, J., Woicik, M., Wurm, M., Yokley, Z., Zaimidoroga, O., Zavatarelli, S., Zuber, K., and Zuzel, G.

Subjects
High Energy Physics - Experiment, Physics - Instrumentation and Detectors
Abstract

We report an improved geo-neutrino measurement with Borexino from 2056 days of data taking. The present exposure is $(5.5\pm0.3)\times10^{31}$ proton$\times$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 $3.6 \times 10^{-9}$ (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., Comment: 4 pages, 4 figures

Published
2015
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22. Solar neutrino with Borexino: results and perspectives

Author

Smirnov, O., Bellini, G., Benziger, J., Bick, D., Bonfini, G., Bravo, D., Caccianiga, B., Calaprice, F., Caminata, A., Cavalcante, P., Chavarria, A., Chepurnov, A., D'Angelo, D., Davini, S., Derbin, A., Empl, A., Etenko, A., Fomenko, K., Franco, D., Fiorentini, G., Galbiati, C., Gazzana, S., Ghiano, C., Giammarchi, M., Goeger-Neff, M., Goretti, A., Hagner, C., Hungerford, E., Ianni, Aldo, Ianni, Andrea, Kobychev, V., Korablev, D., Korga, G., Kryn, D., Laubenstein, M., Lehnert, B., Lewke, T., Litvinovich, E., Lombardi, F., Lombardi, P., Ludhova, L., Lukyanchenko, G., Machulin, I., Manecki, S., Maneschg, W., Mantovani, F., Marcocci, S., Meindl, Q., Meroni, E., Meyer, M., Miramonti, L., Misiaszek, M., Mosteiro, P., Muratova, V., Oberauer, L., Obolensky, M., Ortica, F., Otis, K., Pallavicini, M., Papp, L., Perasso, L., Pocar, A., Ranucci, G., Razeto, A., Re, A., Ricci, B., Romani, A., Rossi, N., Saldanha, R., Salvo, C., Schoenert, S., Simgen, H., Skorokhvatov, M., Sotnikov, A., Sukhotin, S., Suvorov, Y., Tartaglia, R., Testera, G., Vignaud, D., Vogelaar, R. B., von Feilitzsch, F., Wang, H., Winter, J., Wojcik, M., Wright, A., Wurm, M., Zaimidoroga, O., Zavatarelli, S., Zuber, K., and Zuzel, G.

Subjects
Physics - Instrumentation and Detectors, High Energy Physics - Experiment
Abstract

Borexino is a unique detector able to perform measurement of solar neutrinos fluxes in the energy region around 1 MeV or below due to its low level of radioactive background. It was constructed at the LNGS underground laboratory with a goal of solar $^{7}$Be neutrino flux measurement with 5\% precision. The goal has been successfully achieved marking the end of the first stage of the experiment. A number of other important measurements of solar neutrino fluxes have been performed during the first stage. Recently the collaboration conducted successful liquid scintillator repurification campaign aiming to reduce main contaminants in the sub-MeV energy range. With the new levels of radiopurity Borexino can improve existing and challenge a number of new measurements including: improvement of the results on the Solar and terrestrial neutrino fluxes measurements; measurement of pp and CNO solar neutrino fluxes; search for non-standard interactions of neutrino; study of the neutrino oscillations on the short baseline with an artificial neutrino source (search for sterile neutrino) in context of SOX project., Comment: 15 pages, 4 figures

Published
2014
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23. Recent Borexino results and prospects for the near future

Author

D'Angelo, D., Bellini, G., Benziger, J., Bick, D., Bonfini, G., Avanzini, M. Buizza, Caccianiga, B., Cadonati, L., Calaprice, F., Cavalcante, P., Chavarria, A., Chepurnov, A., Davini, S., Derbin, A., Empl, A., Etenko, A., von Feilitzsch, F., 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., Korablev, D., Korga, G., Kryn, D., Laubenstein, M., Lehnert, B., Lewke, T., Litvinovich, E., Lombardi, F., Lombardi, P., Ludhova, L., Lukyanchenko, G., Machulin, I., Manecki, S., Maneschg, W., 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., Romani, A., Rossi, N., Saldanha, R., Salvo, C., Schoenert, S., Simgen, H., Skorokhvatov, M., Smirnov, O., Sotnikov, A., Sukhotin, S., Suvorov, Y., Tartaglia, R., Testera, G., Vignaud, D., Vogelaar, R. B., Winter, J., Wojcik, M., Wright, A., Wurm, M., Xu, J., Zaimidoroga, O., Zavatarelli, S., Zuber, K., and Zuzel, G.

Subjects
High Energy Physics - Experiment, Physics - Instrumentation and Detectors
Abstract

The Borexino experiment, located in the Gran Sasso National Laboratory, is an organic liquid scintillator detector conceived for the real time spectroscopy of low energy solar neutrinos. The data taking campaign phase I (2007 - 2010) has allowed the first independent measurements of 7Be, 8B and pep fluxes as well as the first measurement of anti-neutrinos from the earth. After a purification of the scintillator, Borexino is now in phase II since 2011. We review here the recent results achieved during 2013, concerning the seasonal modulation in the 7Be signal, the study of cosmogenic backgrounds and the updated measurement of geo-neutrinos. We also review the upcoming measurements from phase II data (pp, pep, CNO) and the project SOX devoted to the study of sterile neutrinos via the use of a 51Cr neutrino source and a 144Ce-144Pr antineutrino source placed in close proximity of the active material., Comment: 8 pages, 11 figures. To be published as proceedings of Rencontres de Moriond EW 2014

Published
2014

24. New limits on heavy sterile neutrino mixing in ${^{8}\rm{B}}$-decay obtained with the Borexino detector

Author

Borexino collaboration, Bellini, G., Benziger, J., Bick, D., Bonfini, G., Bravo, D., Avanzini, M. Buizza, Caccianiga, B., Cadonati, L., Calaprice, F., Cavalcante, P., Chavarria, A., Chepurnov, A., DAngelo, D., Davini, S., Derbin, A., Drachnev, I., Empl, A., Etenko, A., Fomenko, K., Franco, D., Galbiati, C., Gazzana, S., Ghiano, C., Giammarchi, M., Goger-Neff, M., Goretti, A., Grandi, L., Hagner, C., Hungerford, E., Ianni, Aldo, Ianni, Andrea, Kobychev, V., Korablev, D., Korga, G., Kryn, D., Laubenstein, M., Lewke, T., Litvinovich, E., Loer, B., Lombardi, F., Lombardi, P., Ludhova, L., Lukyanchenko, G., Machulin, I., Manecki, S., Maneschg, W., 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., Romani, A., Rossi, N., Saldanha, R., Salvo, C., Schonert, S., Simgen, H., Skorokhvatov, M., Smirnov, O., Sotnikov, A., Sukhotin, S., Suvorov, Y., Tartaglia, R., Testera, G., Vignaud, D., Vogelaar, R. B., von Feilitzsch, F., Winter, J., Wojcik, M., Wright, A., Wurm, M., Xu, J., Zaimidoroga, O., Zavatarelli, S., and Zuzel, G.

Subjects
High Energy Physics - Experiment, High Energy Physics - Phenomenology, Nuclear Experiment
Abstract

If heavy neutrinos with mass $m_{\nu_{H}}\geq$2$ m_e $ are produced in the Sun via the decay ${^8\rm{B}} \rightarrow {^8\rm{Be}} + e^+ + \nu_H$ in a side branch of pp-chain, they would undergo the observable decay into an electron, a positron and a light neutrino $\nu_{H}\rightarrow\nu_{L}+e^++e^-$. In the present work Borexino data are used to set a bound on the existence of such decays. We constrain the mixing of a heavy neutrino with mass 1.5 MeV $\leq m_{\nu_{H}} \le$ 14 MeV to be $|U_{eH}|^2\leq (10^{-3}-4\times10^{-6})$ respectively. These are tighter limits on the mixing parameters than obtained in previous experiments at nuclear reactors and accelerators., Comment: 7 pages, 6 figures

Published
2013
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25. Final results of Borexino Phase-I on low energy solar neutrino spectroscopy

Author

Borexino Collaboration, Bellini, G., Benziger, J., Bick, D., Bonfini, G., Bravo, D., Avanzini, M. B., Caccianiga, B., Cadonati, L., Calaprice, F., Cavalcante, P., Chavarria, A., Chepurnov, A., D'Angelo, D., Davini, S., Derbin, A., Empl, A., Etenko, A., 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., Korablev, D., Korga, G., Kryn, D., Laubenstein, M., Lewke, T., Litvinovich, E., Loer, B., Lombardi, F., Lombardi, P., Ludhova, L., Lukyanchenko, G., Machulin, I., Manecki, S., Maneschg, W., 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., Pena-Garay, C., Perasso, L., Perasso, S., Pocar, A., Ranucci, G., Razeto, A., Re, A., Romani, A., Rossi, N., Saldanha, R., Salvo, C., Schoenert, S., Simgen, H., Skorokhvatov, M., Smirnov, O., Sotnikov, A., Sukhotin, S., Suvorov, Y., Tartaglia, R., Testera, G., Vignaud, D., Vogelaar, R. B., von Feilitzsch, F., Winter, J., Wojcik, M., Wright, A., Wurm, M., Xu, J., Zaimidoroga, O., Zavatarelli, S., and Zuzel, G.

Subjects
High Energy Physics - Experiment, Physics - Instrumentation and Detectors
Abstract

Borexino has been running since May 2007 at the LNGS with the primary goal of detecting solar neutrinos. The detector, a large, unsegmented liquid scintillator calorimeter characterized by unprecedented low levels of intrinsic radioactivity, is optimized for the study of the lower energy part of the spectrum. During the Phase-I (2007-2010) Borexino first detected and then precisely measured the flux of the 7Be solar neutrinos, ruled out any significant day-night asymmetry of their interaction rate, made the first direct observation of the pep neutrinos, and set the tightest upper limit on the flux of CNO neutrinos. In this paper we discuss the signal signature and provide a comprehensive description of the backgrounds, quantify their event rates, describe the methods for their identification, selection or subtraction, and describe data analysis. Key features are an extensive in situ calibration program using radioactive sources, the detailed modeling of the detector response, the ability to define an innermost fiducial volume with extremely low background via software cuts, and the excellent pulse-shape discrimination capability of the scintillator that allows particle identification. We report a measurement of the annual modulation of the 7 Be neutrino interaction rate. The period, the amplitude, and the phase of the observed modulation are consistent with the solar origin of these events, and the absence of their annual modulation is rejected with higher than 99% C.L. The physics implications of phase-I results in the context of the neutrino oscillation physics and solar models are presented.

Published
2013
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26. Cosmogenic Backgrounds in Borexino at 3800 m water-equivalent depth

Author

Bellini, G., Benziger, J., Bick, D., Bonfini, G., Bravo, D., Avanzini, M. Buizza, Caccianiga, B., Cadonati, L., Calaprice, F., Cavalcante, P., Chavarria, A., Chepurnov, A., D'Angelo, D., Davini, S., Derbin, A., Empl, A., Etenko, A., Fomenko, K., Franco, D., Galbiati, C., Gazzana, S., Ghiano, C., Giammarchi, M., Göger-Neff, M., Goretti, A., Grandi, L., Hagner, C., Hungerford, E., Ianni, Aldo, Ianni, Andrea, Kobychev, V., Korablev, D., Korga, G., Kryn, D., Laubenstein, M., Lewke, T., Litvinovich, E., Loer, B., Lombardi, P., Lombardi, F., Ludhova, L., Lukyanchenko, G., Machulin, I., Manecki, S., Maneschg, W., Manuzio, G., Meindl, Q., Meroni, E., Miramonti, L., Misiaszek, M., Möllenberg, R., 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., Romani, A., Rossi, N., Saldanha, R., Salvo, C., Schönert, S., Simgen, H., Skorokhvatov, M., Smirnov, O., Sotnikov, A., Sukhotin, S., Suvorov, Y., Tartaglia, R., Testera, G., Vignaud, D., Vogelaar, R. B., von Feilitzsch, F., Winter, J., Wojcik, M., Wright, A., Wurm, M., Xu, J., Zaimidoroga, O., Zavatarelli, S., and Zuzel, G.

Subjects
Physics - Instrumentation and Detectors, High Energy Physics - Experiment
Abstract

The solar neutrino experiment Borexino, which is located in the Gran Sasso underground laboratories, is in a unique position to study muon-induced backgrounds in an organic liquid scintillator. In this study, a large sample of cosmic muons is identified and tracked by a muon veto detector external to the liquid scintillator, and by the specific light patterns observed when muons cross the scintillator volume. The yield of muon-induced neutrons is found to be Yn =(3.10+-0.11)10-4 n/({\mu} (g/cm2)). The distance profile between the parent muon track and the neutron capture point has the average value {\lambda} = (81.5 +- 2.7)cm. Additionally the yields of a number of cosmogenic radioisotopes are measured for 12N, 12B, 8He, 9C, 9Li, 8B, 6He, 8Li, 11Be, 10C and 11C. All results are compared with Monte Carlo simulation predictions using the Fluka and Geant4 packages. General agreement between data and simulation is observed for the cosmogenic production yields with a few exceptions, the most prominent case being 11C yield for which both codes return about 50% lower values. The predicted {\mu}-n distance profile and the neutron multiplicity distribution are found to be overall consistent with data., Comment: 26 pages, 13 figures (in 14 files), 4 tables. 3 extra data files. accepted by JCAP

Published
2013
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27. Measurement of geo-neutrinos from 1353 days of Borexino

Author

Bellini, G., Benziger, J., Bick, D., Bonfini, G., Bravo, D., Avanzini, M. Buizza, Caccianiga, B., Cadonati, L., Calaprice, F., Cavalcante, P., Chavarria, A., 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. V., Korablev, D., Korga, G., Koshio, Y., Kryn, D., Laubenstein, M., Lewke, T., Litvinovich, E., Loer, B., Lombardi, P., Lombardi, F., Ludhova, L., Lukyanchenko, G., Machulin, I., Manecki, S., Maneschg, W., Mantovani, F., 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., Schoenert, S., Simgen, H., Skorokhvatov, M., Smirnov, O., Sotnikov, A., Sukhotin, S., Suvorov, Y., Tartaglia, R., Testera, G., Vignaud, D., Vogelaar, R. B., von Feilitzsch, F., Winter, J., Wojcik, M., Wright, A., Wurm, M., Xu, J., Zaimidoroga, O., Zavatarelli, S., and Zuzel, G.

Subjects
High Energy Physics - Experiment, Physics - Instrumentation and Detectors
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., Comment: 9 pages, 6 figures

Published
2013
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28. Lifetime measurements of 214Po and 212Po with the CTF liquid scintillator detector at LNGS

Author

Borexino Collaboration, Bellini, G., Benziger, J., Bick, D., Bonfini, G., Bravo, D., Avanzini, M. Buizza, Caccianiga, B., Cadonati, L., Calaprice, F., Carraro, C., Cavalcante, P., Chavarria, A., Chepurnov, A., Chubakov, V., D'Angelo, D., Davini, S., Derbin, A., Etenko, A., Fomenko, K., Franco, D., Galbiati, C., Gazzana, S., Ghiano, C., Giammarchi, M., Göger-Neff, M., Goretti, A., Grandi, L., Guardincerri, E., Hardy, S., Ianni, Aldo, Ianni, Andrea, Kobychev, V., Korablev, D., Korga, G., Koshio, Y., Kryn, D., Laubenstein, M., Lewke, T., Lissia, Marcello, Litvinovich, E., Loer, B., Lombardi, F., Lombardi, P., Ludhova, L., Machulin, I., Manecki, S., Maneschg, W., Manuzio, G., Meindl, Q., Meroni, E., Miramonti, L., Misiaszek, M., Montanari, D., Mosteiro, P., Mantovani, F., Muratova, V., Nisi, S., Oberauer, L., Obolensky, M., Ortica, F., Otis, K., Pallavicini, M., Papp, L., Perasso, L., Perasso, S., Pocar, A., Ranucci, G., Razeto, A., Re, A., Romani, A., Rossi, N., Sabelnikov, A., Saldanha, R., Salvo, C., Schönert, S., Simgen, H., Skorokhvatov, M., Smirnov, O., Sotnikov, A., Sukhotin, S., Suvorov, Y., Tartaglia, R., Testera, G., Vogelaar, R. B., von Feilitzsch, F., Winter, J., Wojcik, M., Wright, A., Wurm, M., Xhixha, G., Xu, J., Zaimidoroga, O., Zavatarelli, S., and Zuzel, G.

Subjects
Nuclear Experiment, High Energy Physics - Phenomenology, Nuclear Theory, Physics - Instrumentation and Detectors
Abstract

We have studied the alpha decays of 214Po into 210Pb and of 212Po into 208Pb tagged by the coincidence with the preceding beta decays from 214Bi and 212Bi, respectively. The employed 222Rn, 232Th, and 220Rn sources were sealed inside quartz vials and inserted in the Counting Test Facility at the underground Gran Sasso National Laboratory in Italy. We find that the mean lifetime of 214Po is (236.00 +- 0.42(stat) +- 0.15(syst)) \mu s and that of 212Po is (425.1 +- 0.9(stat) +- 1.2(syst)) ns. Our results, obtained from data with signal-to-background ratio larger than 1000, reduce the overall uncertainties and are compatible with previous measurements., Comment: RevTex, 11 pages, 5 figures, 3 tables. This second version matches the one accepted for publication in EPJA: minor stylistic changes plus a discussion of calibration of TDC time scale

Published
2012

29. Borexino calibrations: Hardware, Methods, and Results

Author

Borexino collaboration, Back, H., Bellini, G., Benziger, J., Bick, D., Bonfini, G., Bravo, D., Avanzini, M. Buizza, Caccianiga, B., Cadonati, L., Calaprice, F., Carraro, C., Cavalcante, P., Chavarria, A., D'Angelo, D., Davini, S., Derbin, A., Etenko, A., von Feilitzsch, F., Fernandes, G., Fomenko, K., Franco, D., Galbiati, C., Gazzana, S., Ghiano, C., Giammarchi, M., Goeger-Neff, M., Goretti, A., Grandi, L., Guardincerri, E., Hardy, S., Ianni, Aldo, Ianni, Andrea, Kayunov, A., Kidner, S., Kobychev, V., Korablev, D., Korga, G., Koshio, Y., Kryn, D., Laubenstein, M., Lewke, T., Litvinovich, E., Loer, B., Lombardi, F., Lombardi, P., Ludhova, L., Machulin, I., Manecki, S., Maneschg, W., Manuzio, G., Meindl, Q., Meroni, E., Miramonti, L., Misiaszek, M., Montanari, D., Mosteiro, P., Muratova, V., Oberauer, L., Obolensky, M., Ortica, F., Otis, K., Pallavicini, M., Papp, L., Perasso, L., Perasso, S., Pocar, A., Raghavan, R. S., Ranucci, G., Razeto, A., Re, A., Romani, A., Rossi, N., Rountree, D., Sabelnikov, A., Saldanha, R., Salvo, C., Schonert, S., Simgen, H., Skorokhvatov, M., Smirnov, O., Sotnikov, A., Sukhotin, S., Suvorov, Y., Tartaglia, R., Testera, G., Vignaud, D., Vogelaar, R. B., Winter, J., Wojcik, M., Wright, A., Wurm, M., Xu, J., Zaimidoroga, O., Zavatarelli, S., and Zuzel, G.

Subjects
Physics - Instrumentation and Detectors
Abstract

Borexino was the first experiment to detect solar neutrinos in real-time in the sub-MeV region. In order to achieve high precision in the determination of neutrino rates, the detector design includes an internal and an external calibration system. This paper describes both calibration systems and the calibration campaigns that were carried out in the period between 2008 and 2011. We discuss some of the results and show that the calibration procedures preserved the radiopurity of the scintillator. The calibrations provided a detailed understanding of the detector response and led to a significant reduction of the systematic uncertainties in the Borexino measurements.

Published
2012
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30. Solar neutrino physics with Borexino I

Author

Ludhova, L., Bellini, G., Benziger, J., Bick, D., Bonfini, G., Bravo, D., Avanzini, M. Buizza, Caccianiga, B., Cadonati, L., Calaprice, F., Carraro, C., Cavalcante, P., Chavarria, A., D'Angelo, D., Davini, S., Derbin, A., Etenko, A., Fomenko, K., Franco, D., Galbiati, C., Gazzana, S., Ghiano, C., Giammarchi, M., Goeger-Nef, M., Goretti, A., Grandi, L., Guardincerri, E., Hardy, S., Ianni, Aldo, Ianni, Andrea, Kayunov, A., Kobychev, V., Korablev, D., Korga, G., Koshio, Y., Kryn, D., Laubenstein, M., Lewke, T., Litvinovich, E., Loer, B., Lombardi, F., Lombardi, P., Machulin, I., Manecki, S., Maneschg, W., Manuzio, G., Meindl, Q., Meroni, E., Miramonti, L., Misiaszek, M., Montanari, D., Mosteiro, P., Muratova, V., Oberauer, L., Obolenksy, M., Ortica, F., Otis, K., Pallavicini, M., Papp, L., Perasso, L., Perasso, S., Pocar, A., Raghavan, R. S., Ranucci, G., Razeto, A., Re, A., Romani, P. A., Sabelnikov, A., Saldanha, R., Salvo, C., Schoenert, S., Simgen, H., Skorokhvatov, M., Smirnov, O., Sotnikov, A., Sukhotin, S., Suvorov, Y., Tartaglia, R., Testera, G., Vignaud, D., Vogelaar, R. B., Von Feilitzsch, F., Winter, J., Wojcik, M., Wright, A., Wurm, M., Xu, J., Zaimidoroga, O., Zavatarelli, S., and Zuzel, G.

Subjects
High Energy Physics - Experiment, Astrophysics - Solar and Stellar Astrophysics
Abstract

Borexino is a large-volume liquid scintillator detector installed in the underground halls of the Laboratori Nazionali del Gran Sasso in Italy. After several years of construction, data taking started in May 2007. The Borexino phase I ended after about three years of data taking. Borexino provided the first real time measurement of the $^{7}$Be solar neutrino interaction rate with accuracy better than 5% and confirmed the absence of its day-night asymmetry with 1.4% precision. This latter Borexino results alone rejects the LOW region of solar neutrino oscillation parameters at more than 8.5 $\sigma$ C.L. Combined with the other solar neutrino data, Borexino measurements isolate the MSW-LMA solution of neutrino oscillations without assuming CPT invariance in the neutrino sector. Borexino has also directly observed solar neutrinos in the 1.0-1.5 MeV energy range, leading to the first direct evidence of the $pep$ solar neutrino signal and the strongest constraint of the CNO solar neutrino flux up to date. Borexino provided the measurement of the solar $^{8}$B neutrino rate with 3 MeV energy threshold., Comment: 6 pages, 4 figures, proceedings to Moriond 2012 EW session

Published
2012

31. Relativistic Dynamics of a Charged Particle in an Electroscalar Field

Author

Podgainy, D. V. and Zaimidoroga, O. A.

Subjects
Physics - Classical Physics, Mathematical Physics
Abstract

This article devoted to relativistic dynamics of a charged massive particle in an electroscalar field. It represents a continuation of paper [1] where the authors constructed a non-relativistic theory which describes transverse electromagnetic waves along with longitudinal electroscalar ones, responsible for the wave transport of the Coulomb field. A new type of relativistic force exerted by electroscalar field on an electrically charged particle and the relativistic law of superposition of electromagnetic transverse and electroscalar longitudinal fields are established. Also, a relativistically invariant form of a Lagrangian describing the interaction between an electroscalar field and massive electrically charged particle is defined.

Published
2012

32. Cosmic-muon flux and annual modulation in Borexino at 3800 m water-equivalent depth

Author

Bellini, G., Benziger, J., Bick, D., Bonfini, G., Bravo, D., Avanzini, M. Buizza, Caccianiga, B., Cadonati, L., Calaprice, F., Carraro, C., Cavalcante, P., Chavarria, A., Chepurnov, A., D'Angelo, D., Davini, S., Derbin, A., Etenko, A., von Feilitzsch, F., Fomenko, K., Franco, D., Galbiati, C., Gazzana, S., Ghiano, C., Giammarchi, M., Goeger-Neff, M., Goretti, A., Grandi, L., Guardincerri, E., Hagner, C., Hardy, S., Ianni, Aldo, Ianni, Andrea, Korablev, D., Korga, G., Koshio, Y., Kryn, D., Laubenstein, M., Lewke, T., Litvinovich, E., Loer, B., Lombardi, F., Lombardi, P., Ludhova, L., Machulin, I., Manecki, S., Maneschg, W., Manuzio, G., Meindl, Q., Meroni, E., Miramonti, L., Misiaszek, M., Montanari, D., Mosteiro, P., Muratova, V., Oberauer, L., Obolensky, M., Ortica, F., Otis, K., Pallavicini, M., Papp, L., Perasso, L., Perasso, S., Pocar, A., Raghavan, R. S., Ranucci, G., Razeto, A., Re, A., Romani, A., Sabelnikov, A., Saldanha, R., Salvo, C., Schönert, S., Simgen, H., Skorokhvatov, M., Smirnov, O., Sotnikov, A., Sukhotin, S., Suvorov, Y., Tartaglia, R., Testera, G., Vignaud, D., Vogelaar, R. B., Winter, J., Wojcik, M., Wright, A., Wurm, M., Xu, J., Zaimidoroga, O., Zavatarelli, S., and Zuzel, G.

Subjects
High Energy Physics - Experiment, Astrophysics - Instrumentation and Methods for Astrophysics, Physics - Atmospheric and Oceanic Physics
Abstract

We have measured the muon flux at the underground Gran Sasso National Laboratory (3800 m w.e.) to be (3.41 \pm 0.01) \times 10-4m-2s-1 using four years of Borexino data. A modulation of this signal is observed with a period of (366\pm3) days and a relative amplitude of (1.29 \pm 0.07)%. The measured phase is (179 \pm 6) days, corresponding to a maximum on the 28th of June. Using the most complete atmospheric data models available, muon rate fluctuations are shown to be positively correlated with atmospheric temperature, with an effective coefficient {\alpha}T = 0.93 \pm 0.04. This result represents the most precise study of the muon flux modulation for this site and is in good agreement with expectations., Comment: 14 pages, 8 figures, published on JCAP as JCAP05(2012)015 on May 15th 2012

Published
2012
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33. Muon and Cosmogenic Neutron Detection in Borexino

Author

Borexino Collaboration, Bellini, G., Benziger, J., Bick, D., Bonetti, S., Avanzini, M. Buizza, Caccianiga, B., Cadonati, L., Calaprice, F., Carraro, C., Chavarria, A., Chepurnov, A., D'Angelo, D., Davini, S., Derbin, A., Etenko, A., von Feilitzsch, F., Fomenko, K., Franco, D., Galbiati, C., Gazzana, S., Ghiano, C., Giammarchi, M., Goeger-Neff, M., Goretti, A., Guardincerri, E., Hardy, S., Ianni, Aldo, Ianni, Andrea, Joyce, M., Kobychev, V., Koshio, Y., Korablev, D., Korga, G., Kryn, D., Laubenstein, M., Lendvai, C., Lewke, T., Litvinovich, E., Loer, B., Lombardi, F., Lombardi, P., Ludhova, L., Machulin, I., Manecki, S., Maneschg, W., Manuzio, G., Meindl, Q., Meroni, E., Miramonti, L., Misiaszek, M., Montanari, D., Muratova, V., Oberauer, L., Obolensky, M., Ortica, F., Pallavicini, M., Papp, L., Perasso, L., Perasso, S., Pocar, A., Raghavan, R. S., Ranucci, G., Razeto, A., Re, A., Romani, A., Rountree, D., Sabelnikov, A., Saldanha, R., Salvo, C., Schönert, S., Simgen, H., Skorokhvatov, M., Smirnov, O., Sotnikov, A., Sukhotin, S., Suvorov, Y., Tartaglia, R., Testera, G., Vignaud, D., Vogelaar, R. B., Winter, J., Wojcik, M., Wright, A., Wurm, M., Xu, J., Zaimidoroga, O., Zavatarelli, S., and Zuzel, G.

Subjects
Physics - Instrumentation and Detectors, Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

Borexino, a liquid scintillator detector at LNGS, is designed for the detection of neutrinos and antineutrinos from the Sun, supernovae, nuclear reactors, and the Earth. The feeble nature of these signals requires a strong suppression of backgrounds below a few MeV. Very low intrinsic radiogenic contamination of all detector components needs to be accompanied by the efficient identification of muons and of muon-induced backgrounds. Muons produce unstable nuclei by spallation processes along their trajectory through the detector whose decays can mimic the expected signals; for isotopes with half-lives longer than a few seconds, the dead time induced by a muon-related veto becomes unacceptably long, unless its application can be restricted to a sub-volume along the muon track. Consequently, not only the identification of muons with very high efficiency but also a precise reconstruction of their tracks is of primary importance for the physics program of the experiment. The Borexino inner detector is surrounded by an outer water-Cherenkov detector that plays a fundamental role in accomplishing this task. The detector design principles and their implementation are described. The strategies adopted to identify muons are reviewed and their efficiency is evaluated. The overall muon veto efficiency is found to be 99.992% or better. Ad-hoc track reconstruction algorithms developed are presented. Their performance is tested against muon events of known direction such as those from the CNGS neutrino beam, test tracks available from a dedicated External Muon Tracker and cosmic muons whose angular distribution reflects the local overburden profile. The achieved angular resolution is 3-5 deg and the lateral resolution is 35-50 cm, depending on the impact parameter of the crossing muon. The methods implemented to efficiently tag cosmogenic neutrons are also presented., Comment: 42 pages. 32 figures on 37 files. Uses JINST.cls. 1 auxiliary file (defines.tex) with TEX macros. submitted to Journal of Instrumentation

Published
2011
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34. Nonrelativistic theory of electroscalar field and Maxwell electrodynamics

Author

Podgainy, D. V. and Zaimidoroga, O. A.

Subjects
Physics - Classical Physics, Mathematical Physics
Abstract

In this work, a non-relativistic theory of the electroscalar field being an expansion of the classical Maxwell's electrodynamics is presented. Expansion of the classical electrodynamics is based on the hypothesis about an existing new 4-scalar potential complementary to the 4-vector electrodynamic potential. 4-scalar potential, from the viewpoint of the quantum field concept, describes massless scalar particles with a zero spin whose superposition realizes the Coulomb field. In a nonrelativistic approximation this hypothesis leads to the theory in which along with the electric and magnetic fields there arises a new scalar field that can propagate jointly with the electric field in vacuum in the form of a longitudinal electroscalar wave and, thus, transport of the Coulomb field is carried out. Indicative of the arising complementary scalar field is the analogy between the linear theory of elasticity and Maxwell electrodynamics considered in this work. From this analogy it follows that full agreement between the Lame equations and Maxwell equations is reached under the condition of incompressibility of the elastic continuum, while describing the compressible continuum necessitates introduction of a new scalar field. Since the 4-vector electrodynamic and new 4-scalar potentials do not form a single geometric object in the Minkowski space-time, in a nonrelativistic approximation the electromagnetic and electroscalar fields appear to be independent and do not interfere. In the paper, the problem of interaction of the introduced scalar field with charges and currents is also considered and electrodynamics based on the Fock and Podolsky Lagrangian is briefly discussed.

Published
2010

35. The Monte Carlo simulation of the Borexino detector

Author

Agostini, M., Altenmüller, K., Appel, S., Atroshchenko, V., Bagdasarian, Z., Basilico, D., Bellini, G., Benziger, J., Bick, D., Bonfini, G., Borodikhina, L., Bravo, D., Caccianiga, B., Calaprice, F., Caminata, A., Canepa, M., Caprioli, S., Carlini, M., Cavalcante, P., Chepurnov, A., Choi, K., D’Angelo, D., Davini, S., Derbin, A., Ding, X.F., Di Noto, L., Drachnev, I., Fomenko, K., Formozov, A., Franco, D., Froborg, F., Gabriele, F., Galbiati, C., Ghiano, C., Giammarchi, M., Goeger-Neff, M., Goretti, A., Gromov, M., Hagner, C., Houdy, T., Hungerford, E., Ianni, Aldo, Ianni, Andrea, Jany, A., Jeschke, D., Kobychev, V., Korablev, D., Korga, G., Kryn, D., Laubenstein, M., Litvinovich, E., Lombardi, F., Lombardi, P., Ludhova, L., Lukyanchenko, G., Machulin, I., Magnozzi, M., Manuzio, G., Marcocci, S., Martyn, J., Meroni, E., Meyer, M., Miramonti, L., Misiaszek, M., Muratova, V., Neumair, B., Oberauer, L., Opitz, B., Ortica, F., Pallavicini, M., Papp, L., Pocar, A., Ranucci, G., Razeto, A., Re, A., Romani, A., Roncin, R., Rossi, N., Schönert, S., Semenov, D., Shakina, P., Skorokhvatov, M., Smirnov, O., Sotnikov, A., Stokes, L.F.F., Suvorov, Y., Tartaglia, R., Testera, G., Thurn, J., Toropova, M., Unzhakov, E., Vishneva, A., Vogelaar, R.B., von Feilitzsch, F., Wang, H., Weinz, S., Wojcik, M., Wurm, M., Yokley, Z., Zaimidoroga, O., Zavatarelli, S., Zuber, K., and Zuzel, G.

Published
2018
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36. On the possiblity of detecting Solar pp-neutrino with a large volume liquid organic scintillator detector

Author

Derbin, A. V., Smirnov, O. Yu., and Zaimidoroga, O. A.

Subjects
Physics - Instrumentation and Detectors
Abstract

It is shown that a large volume liquid organic scintillator detector with an energy resolution of 10 keV at 200 keV 1 sigma will be sensitive to solar pp-neutrino, if operated at the target radiopurity levels for the Borexino detector, or the solar neutrino project of KamLAND., Comment: 18 pages, 2 figures, 4 tables. Contributed paper to the Nonaccelerating New Neutrino Physic. NANP-2003, Dubna. To be published in Phys.At.Nucl.(2004)

Published
2004
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37. Borexino’s search for low-energy neutrino and antineutrino signals correlated with gamma-ray bursts

Author

Agostini, M., Altenmüller, K., Appel, S., Atroshchenko, V., Bellini, G., Benziger, J., Bick, D., Bonfini, G., Bravo, D., Caccianiga, B., Calaprice, F., Caminata, A., Carlini, M., Cavalcante, P., Chepurnov, A., Choi, K., D’Angelo, D., Davini, S., de Kerret, H., Derbin, A., Di Noto, L., Drachnev, I., Etenko, A., Fomenko, K., Franco, D., Gabriele, F., Galbiati, C., Ghiano, C., Giammarchi, M., Goeger-Neff, M., Goretti, A., Gromov, M., Hagner, C., Hungerford, E., Ianni, Aldo, Ianni, Andrea, Jany, A., Jedrzejczak, K., Jeschke, D., Kobychev, V., Korablev, D., Korga, G., Kryn, D., Laubenstein, M., Lehnert, B., Litvinovich, E., Lombardi, F., Lombardi, P., Ludhova, L., Lukyanchenko, G., Machulin, I., Manecki, S., Maneschg, W., Manuzio, G., Marcocci, S., Meroni, E., Meyer, M., Miramonti, L., Misiaszek, M., Montuschi, M., Mosteiro, P., Muratova, V., Neumair, B., Oberauer, L., Obolensky, M., Ortica, F., Pallavicini, M., Papp, L., Pocar, A., Ranucci, G., Razeto, A., Re, A., Romani, A., Roncin, R., Rossi, N., Schönert, S., Semenov, D., Skorokhvatov, M., Smirnov, O., Sotnikov, A., Sukhotin, S., Suvorov, Y., Tartaglia, R., Testera, G., Thurn, J., Toropova, M., Unzhakov, E., Vishneva, A., Vogelaar, R.B., von Feilitzsch, F., Wang, H., Weinz, S., Winter, J., Wojcik, M., Wurm, M., Yokley, Z., Zaimidoroga, O., Zavatarelli, S., Zuber, K., and Zuzel, G.

Published
2017
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38. SOX: Short Distance Neutrino Oscillations with Borexino

Author

Agostini, M., Althenmüller, K., Bellini, G., Benziger, J., Berton, N., Bick, D., Bonfini, G., Caccianiga, B., Cadonati, L., Calaprice, F., Caminata, A., Cavalcante, P., Chavarria, A., Chepurnov, A., Cribier, M., D'Angelo, D., Davini, S., Derbin, A., di Noto, L., Durero, M., Empl, A., Etenko, A., Farinon, S., Fischer, V., Fomenko, K., Franco, D., Gabriele, F., Gaffiot, J., Galbiati, C., Gazzana, S., Ghiano, C., Giammarchi, M., Göger-Neff, M., Goretti, A., Grandi, L., Gromov, M., Hagner, C., Houdy, Th., Hungerford, E., Ianni, Aldo, Ianni, Andrea, Jonquères, N., Kobychev, V., Korablev, D., Korga, G., Kryn, D., Lasserre, T., Laubenstein, M., Lehnert, B., Lewke, T., Link, J., Litvinovich, E., Lombardi, F., Lombardi, P., Ludhova, L., Lukyanchenko, G., Machulin, I., Manecki, S., Maneschg, W., Marcocci, S., Maricic, J., Meindl, Q., Mention, G., Meroni, E., Meyer, M., Miramonti, L., Misiaszek, M., Montuschi, M., Mosteiro, P., Muratova, V., Musenich, R., Oberauer, L., Obolensky, M., Ortica, F., Otis, K., Pallavicini, M., Papp, L., Perasso, L., Pocar, A., Ranucci, G., Razeto, A., Re, A., Romani, A., Rossi, N., Saldanha, R., Salvo, C., Schönert, S., Scola, L., Simgen, H., Skorokhvatov, M., Smirnov, O., Sotnikov, A., Sukhotin, S., Suvorov, Y., Tartaglia, R., Testera, G., Veyssière, C., Vivier, M., Vogelaar, R.B., von Feilitzsch, F., Wang, H., Winter, J., Wojcik, M., Wright, A., Wurm, M., Zaimidoroga, O., Zavatarelli, S., Zuber, K., Zuzel, G., and Bravo-Berguño, D.

Published
2016
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39. Recent results from Borexino and the first real time measure of solar pp neutrinos

Author

Zavatarelli, S., Bellini, G., Benziger, J., Bick, D., Bonfini, G., Bravo, D., Caccianiga, B., Cadonati, L., Calaprice, F., Caminata, A., Cavalcante, P., Chavarria, A., Chepurnov, A., D'Angelo, D., Davini, S., Derbin, A., Empl, A., Etenko, A., Fomenko, K., Franco, D., Gabriele, F., Galbiati, C., Gazzana, S., Ghiano, C., Giammarchi, M., Göger-Neff, M., Goretti, A., Gromov, M., Hagner, C., Hungerford, E., Ianni, Aldo, Ianni, Andrea, Kobychev, V., Korablev, D., Korga, G., Kryn, D., Laubenstein, M., Lehnert, B., Lewke, T., Litvinovich, E., Lombardi, F., Lombardi, P., Ludhova, L., Lukyanchenko, G., Machulin, I., Manecki, S., Maneschg, W., Marcocci, S., Meindl, Q., Meroni, E., Meyer, M., Miramonti, L., Misiaszek, M., Montuschi, M., Mosteiro, P., Muratova, V., Oberauer, L., Obolensky, M., Ortica, F., Otis, K., Pallavicini, M., Papp, L., Perasso, L., Pocar, A., Ranucci, G., Razeto, A., Re, A., Romani, A., Rossi, N., Saldanha, R., Salvo, C., Schönert, S., Simgen, H., Skorokhvatov, M., Smirnov, O., Sotnikov, A., Sukhotin, S., Suvorov, Y., Tartaglia, R., Testera, G., Vignaud, D., Vogelaar, R.B., von Feilitzsch, F., Wang, H., Winter, J., Wojcik, M., Wright, A., Wurm, M., Zaimidoroga, O., Zuber, K., and Zuzel, G.

Published
2016
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40. Short Distance Neutrino Oscillations with BoreXino: SOX

Author

Smirnov, O., Bellini, G., Benziger, J., Bick, D., Bonfini, G., Bravo, D., Caccianiga, B., Calaprice, F., Caminata, A., Cavalcante, P., Chavarria, A., Chepurnov, A., D’Angelo, D., Davini, S., Derbin, A., Empl, A., Etenko, A., Fomenko, K., Franco, D., Galbiati, C., Gazzana, S., Ghiano, C., Giammarchi, M., Göger-Neff, M., Goretti, A., Hagner, C., Hungerford, E., Ianni, Aldo, Ianni, Andrea, Kobychev, V., Korablev, D., Korga, G., Kryn, D., Laubenstein, M., Lehnert, B., Lewke, T., Litvinovich, E., Lombardi, P., Lombardi, F., Ludhova, L., Lukyanchenko, G., Machulin, I., Manecki, S., Maneschg, W., Marcocci, S., Meindl, Q., Meroni, E., Meyer, M., Miramonti, L., Misiaszek, M., Mosteiro, P., Muratova, V., Oberauer, L., Obolensky, M., Ortica, F., Otis, K., Pallavicini, M., Papp, L., Perasso, L., Pocar, A., Ranucci, G., Razeto, A., Re, A., Romani, A., Rossi, N., Saldanha, R., Salvo, C., Schönert, S., Simgen, H., Skorokhvatov, M., Sotnikov, A., Sukhotin, S., Suvorov, Y., Tartaglia, R., Testera, G., Vignaud, D., Vogelaar, R.B., von Feilitzsch, F., Wang, H., Winter, J., Wojcik, M., Wright, A., Wurm, M., Zaimidoroga, O., Zavatarelli, S., Zuber, K., and Zuzel, G.

Published
2015
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41. Geo-neutrinos from 1353 Days with the Borexino Detector

Author

Miramonti, L., Bellini, G., Benziger, J., Bick, D., Bonfini, G., Bravo, D., Avanzini, M. Buizza, Caccianiga, B., Cadonati, L., Calaprice, F., Cavalcante, P., Chavarria, A., 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.V., Korablev, D., Korga, G., Koshio, Y., Kryn, D., Laubenstein, M., Lewke, T., Litvinovich, E., Loer, B., Lombardi, P., Lombardi, F., Ludhova, L., Lukyanchenko, G., Machulin, I., Manecki, S., Maneschg, W., Mantovani, F., Manuzio, G., Meindl, Q., Meroni, E., 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., Schönert, S., Simgen, H., Skorokhvatov, M., Smirnov, O., Sotnikov, A., Sukhotin, S., Suvorov, Y., Tartaglia, R., Testera, G., Vignaud, D., Vogelaar, R.B., von Feilitzsch, F., Winter, J., Wojcik, M., Wright, A., Wurm, M., Xu, J., Zaimidoroga, O., Zavatarelli, S., and Zuzel, G.

Published
2015
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42. The search for sterile neutrinos with SOX-Borexino

Author

Altenmüller, K., Agostini, M., Appel, S., Bellini, G., Benziger, J., Berton, N., Bick, D., Bonfini, G., Bravo, D., Caccianiga, B., Calaprice, F., Caminata, A., Cavalcante, P., Chepurnov, A., Cribier, M., D’Angelo, D., Davini, S., Derbin, A., di Noto, L., Drachnev, I., Durero, M., Empl, A., Etenko, A., Farinon, S., Fischer, V., Fomenko, K., Franco, D., Gabriele, F., Gaffiot, J., Galbiati, C., Ghiano, C., Giammarchi, M., Göger-Neff, M., Goretti, A., Gromov, M., Hagner, C., Houdy, Th., Hungerford, E., Ianni, Aldo, Ianni, Andrea, Jonqures, N., Kaiser, M., Kobychev, V., Korablev, D., Korga, G., Kryn, D., Lachenmaier, T., Lasserre, T., Laubenstein, M., Lehnert, B., Link, J., Litvinovich, E., Lombardi, F., Lombardi, P., Ludhova, L., Lukyanchenko, G., Machulin, I., Maneschg, W., Marcocci, S., Maricic, J., Mention, G., Meroni, E., Meyer, M., Miramonti, L., Misiaszek, M., Montuschi, M., Muratova, V., Musenich, R., Neumair, B., Oberauer, L., Obolensky, M., Ortica, F., Pagani, L., Pallavicini, M., Papp, L., Perasso, L., Pocar, A., Ranucci, G., Razeto, A., Re, A., Roncin, R., Romani, A., Rossi, N., Schönert, S., Scola, L., Semenov, D., Simgen, H., Skorokhvatov, M., Smirnov, O., Sotnikov, A., Sukhotin, S., Suvorov, Y., Tartaglia, R., Testera, G., Toropova, M., Unzhakov, E., Veyssière, C., Vivier, M., Vogelaar, R. B., von Feilitzsch, F., Wang, H., Winter, J., Wojcik, M., Wurm, M., Yokley, Z., Zaimidoroga, O., Zavatarelli, S., Zuber, K., and Zuzel, G.

Published
2016
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43. Lifetimes of 214Po and 212Po measured with Counting Test Facility at Gran Sasso National Laboratory

Author

Miramonti, L., Bellini, G., Benziger, J., Bick, D., Bonfini, G., Bravo, D., Buizza Avanzini, M., Caccianiga, B., Cadonati, L., Calaprice, F., Carraro, C., Cavalcante, P., Chavarria, A., Chubakov, V., D'Angelo, D., Davini, S., Derbin, A., Etenko, A., Fomenko, K., Franco, D., Galbiati, C., Gazzana, S., Ghiano, C., Giammarchi, M., Göger-Neff, M., Goretti, A., Grandi, L., Guardincerri, E., Hardy, S., Ianni, Aldo, Ianni, Andrea, Kobychev, V., Korablev, D., Korga, G., Koshio, Y., Kryn, D., Laubenstein, M., Lewke, T., Lissia, M., Litvinovich, E., Loer, B., Lombardi, F., Lombardi, P., Ludhova, L., Machulin, I., Manecki, S., Maneschg, W., Mantovani, F., Manuzio, G., Meindl, Q., Meroni, E., Misiaszek, M., Montanari, D., Mosteiro, P., Muratova, V., Nisi, S., Oberauer, L., Obolensky, M., Ortica, F., Otis, K., Pallavicini, M., Papp, L., Perasso, L., Perasso, S., Pocar, A., Ranucci, G., Razeto, A., Re, A., Romani, A., Rossi, N., Sabelnikov, A., Saldanha, R., Salvo, C., Schönert, S., Simgen, H., Skorokhvatov, M., Smirnov, O., Sotnikov, A., Sukhotin, S., Suvorov, Y., Tartaglia, R., Testera, G., Vignaud, D., Vogelaar, R.B., von Feilitzsch, F., Winter, J., Wojcik, M., Wright, A., Wurm, M., Xhixha, G., Xu, J., Zaimidoroga, O., Zavatarelli, S., and Zuzel, G.

Published
2014
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44. RESULTS FROM BOREXINO AT LNGS

Author

Davini, Stefano, primary, Agostini, M., additional, Drachnev, I., additional, Marcocci, S., additional, Bellini, G., additional, Caccianiga, B., additional, D’Angelo, D., additional, Giammarchi, M., additional, Lombardi, P., additional, Ludhova, L., additional, Meroni, E., additional, Miramonti, L., additional, Ranucci, G., additional, Re, A., additional, Bonfini, G., additional, Cavalcante, P., additional, Gabriele, F., additional, Goretti, A., additional, Ianni, Aldo, additional, Ianni, Andrea, additional, Korga, G., additional, Razeto, A., additional, Roncin, R., additional, Rossi, N., additional, Tartaglia, R., additional, Caminata, A., additional, Di Noto, L., additional, Ghiano, C., additional, Pallavicini, M., additional, Testera, G., additional, Zavatarelli, S., additional, Appel, S., additional, Papp, L., additional, Schönert, S., additional, von Feilitzsch, F., additional, Bick, D., additional, Hagner, C., additional, Kaiser, M., additional, Meyer, M., additional, Bravo, D., additional, Manecki, S., additional, Vogelaar, R. B., additional, Calaprice, F., additional, Galbiati, C., additional, Mosteiro, P., additional, Chepurnov, A., additional, Gromov, M., additional, Derbin, A., additional, Muratova, V., additional, Semenov, D., additional, Unzhakov, E., additional, Etenko, A., additional, Litvinovich, E., additional, Lukyanchenko, G., additional, Machulin, I., additional, Skorokhvatov, M., additional, Fomenko, K., additional, Korablev, D., additional, Smirnov, O., additional, Sotnikov, A., additional, Vishneva, A., additional, Zaimidoroga, O., additional, Empl, A., additional, Hungerford, E., additional, Franco, D., additional, Kryn, D., additional, Obolensky, M., additional, Pocar, A., additional, Otis, K., additional, Jedrzejczak, K., additional, Misiaszek, M., additional, Wojcik, M., additional, and Zuzel, G., additional

Published
2017
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45. Plan for the measurement of Ξ−-atomic X rays at J-PARC

Author

Tanida, K., Chrien, R. E., Dairaku, S., Evtoukhovitch, E., Fu, Y. Y., Fujimura, H., Hashimoto, O., Hosomi, K., Imai, K., Kalinnikov, V., Kallies, W., Kamigaito, S., Karavchuk, N., Koike, T., Li, C. P., Li, X. M., Ma, Y., Mimori, M., Miwa, K., Moissenko, A., Mzhavia, D., Nakazawa, K., Noumi, H., Samoilov, V., Sato, A., Sato, Y., Sekimoto, M., Senzaka, K., Shirotori, K., Takahashi, H., Takahashi, T., Tamura, H., Toyoda, A., Tsamalaidze, Z., Ukai, M., Watanabe, T., Yoon, C. J., Zaimidoroga, O., Zhou, J., Zhou, S. H., Zhu, L. H., Pochodzalla, Josef, editor, and Walcher, Thomas, editor

Published
2007
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46. Measurement of neutrino flux from the primary proton–proton fusion process in the Sun with Borexino detector

Author

Smirnov, O. Yu., Agostini, M., Appel, S., Bellini, G., Benziger, J., Bick, D., Bonfini, G., Bravo, D., Caccianiga, B., Calaprice, F., Caminata, A., Cavalcante, P., Chepurnov, A., Choi, K., D’Angelo, D., Davini, S., Derbin, A., Di Noto, L., Drachnev, I., Empl, A., Etenko, A., Fomenko, K., Franco, D., Gabriele, F., Galbiati, C., Ghiano, C., Giammarchi, M., Goeger-Neff, M., Goretti, A., Gromov, M., Hagner, C., Hungerford, E., Ianni, Aldo, Ianni, Andrea, Jedrzejczak, K., Kaiser, M., Kobychev, V., Korablev, D., Korga, G., Kryn, D., Laubenstein, M., Lehnert, B., Litvinovich, E., Lombardi, F., Lombardi, P., Ludhova, L., Lukyanchenko, G., Machulin, I., Manecki, S., Maneschg, W., Marcocci, S., Meroni, E., Meyer, M., Miramonti, L., Misiaszek, M., Mosteiro, P., Muratova, V., Neumair, B., Oberauer, L., Obolensky, M., Ortica, F., Otis, K., Pagani, L., Pallavicini, M., Papp, L., Perasso, L., Pocar, A., Ranucci, G., Razeto, A., Re, A., Romani, A., Roncin, R., Rossi, N., Schönert, S., Semenov, D., Simgen, H., Skorokhvatov, M., Sotnikov, A., Sukhotin, S., Suvorov, Y., Tartaglia, R., Testera, G., Thurn, J., Toropova, M., Unzhakov, E., Vogelaar, R. B., von Feilitzsch, F., Wang, H., Weinz, S., Winter, J., Wojcik, M., Wurm, M., Yokley, Z., Zaimidoroga, O., Zavatarelli, S., Zuber, K., and Zuzel, G.

Published
2016
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47. Comprehensive geoneutrino analysis with Borexino

Author

Agostini, M., Altenmüller, K., Bravo, D., Thurn, J., Unzhakov, E., Vishneva, A., Vivier, M., Vogelaar, R. B., von Feilitzsch, Franz, Wojcik, M., Wurm, M., Zaimidoroga, O., Zavatarelli, S., Caccianiga, B., Zuber, K., Zuzel, G., Borexino Collaboration, Calaprice, F., Caminata, A., Cappelli, L., Cavalcante, P., Cavanna, F., Chepurnov, A., Choi, K., D’Angelo, D., Appel, S., Davini, S., Derbin, A., Di Giacinto, A., Di Marcello, V., Ding, X. F., Di Ludovico, A., Di Noto, L., Drachnev, I., Fiorentini, G., Formozov, A., Atroshchenko, V., Franco, D., Gabriele, F., Galbiati, C., Gschwender, M., Ghiano, C., Giammarchi, M., Goretti, A., Gromov, M., Guffanti, D., Hagner, C., Bagdasarian, Z., Hungerford, E., Ianni, Aldo, Ianni, Andrea, Jany, A., Jeschke, D., Kumaran, Sindhujha, Kobychev, V., Korga, G., Lachenmaier, T., Lasserre, T., Basilico, D., Laubenstein, M., Litvinovich, E., Lombardi, P., Lomskaya, I., Ludhová, Livia, Lukyanchenko, G., Lukyanchenko, L., Machulin, I., Mantovani, F., Manuzio, G., Bellini, G., Marcocci, S., Maricic, J., Martyn, J., Meroni, E., Meyer, M., Miramonti, L., Misiaszek, M., Montuschi, M., Muratova, V., Neumair, B., Benziger, J., Nieslony, M., Oberauer, L., Onillon, A., Orekhov, V., Ortica, F., Pallavicini, M., Papp, L., Penek, Ömer, Pietrofaccia, L., Pilipenko, N., Bick, D., Pocar, A., Raikov, G., Ranalli, M. T., Ranucci, G., Razeto, A., Re, A., Redchuk, M., Ricci, B., Romani, A., Rossi, N., Bonfini, G., Rottenanger, S., Schönert, S., Semenov, D., Skorokhvatov, M., Smirnov, O., Sotnikov, A., Strati, V., Suvorov, Y., Tartaglia, R., Testera, G., AstroParticule et Cosmologie (APC (UMR_7164)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Borexino, Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), Agostini, M., Altenmuller, K., Appel, S., Atroshchenko, V., Bagdasarian, Z., Basilico, D., Bellini, G., Benziger, J., Bick, D., Bonfini, G., Bravo, D., Caccianiga, B., Calaprice, F., Caminata, A., Cappelli, L., Cavalcante, P., Cavanna, F., Chepurnov, A., Choi, K., D'Angelo, D., Davini, S., Derbin, A., Di Giacinto, A., Di Marcello, V., Ding, X. F., Di Ludovico, A., Di Noto, L., Drachnev, I., Fiorentini, G., Formozov, A., Franco, D., Gabriele, F., Galbiati, C., Gschwender, M., Ghiano, C., Giammarchi, M., Goretti, A., Gromov, M., Guffanti, D., Hagner, C., Hungerford, E., Ianni, A., Jany, A., Jeschke, D., Kumaran, S., Kobychev, V., Korga, G., Lachenmaier, T., Lasserre, T., Laubenstein, M., Litvinovich, E., Lombardi, P., Lomskaya, I., Ludhova, L., Lukyanchenko, G., Lukyanchenko, L., Machulin, I., Mantovani, F., Manuzio, G., Marcocci, S., Maricic, J., Martyn, J., Meroni, E., Meyer, M., Miramonti, L., Misiaszek, M., Montuschi, M., Muratova, V., Neumair, B., Nieslony, M., Oberauer, L., Onillon, A., Orekhov, V., Ortica, F., Pallavicini, M., Papp, L., Penek, O., Pietrofaccia, L., Pilipenko, N., Pocar, A., Raikov, G., Ranalli, M. T., Ranucci, G., Razeto, A., Re, A., Redchuk, M., Ricci, B., Romani, A., Rossi, N., Rottenanger, S., Schonert, S., Semenov, D., Skorokhvatov, M., Smirnov, O., Sotnikov, A., Strati, V., Suvorov, Y., Tartaglia, R., Testera, G., Thurn, J., Unzhakov, E., Vishneva, A., Vivier, M., Vogelaar, R. B., Von Feilitzsch, F., Wojcik, M., Wurm, M., Zaimidoroga, O., Zavatarelli, S., Zuber, K., Zuzel, G., Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Agostini, M, Altenmuller, K, Appel, S, Atroshchenko, V, Bagdasarian, Z, Basilico, D, Bellini, G, Benziger, J, Bick, D, Bonfini, G, Bravo, D, Caccianiga, B, Calaprice, F, Caminata, A, Cappelli, L, Cavalcante, P, Cavanna, F, Chepurnov, A, Choi, K, D'Angelo, D, Davini, S, Derbin, A, Di Giacinto, A, Di Marcello, V, Ding, X, Di Ludovico, A, Di Noto, L, Drachnev, I, Fiorentini, G, Formozov, A, Franco, D, Gabriele, F, Galbiati, C, Gschwender, M, Ghiano, C, Giammarchi, M, Goretti, A, Gromov, M, Guffanti, D, Hagner, C, Hungerford, E, Ianni, A, Jany, A, Jeschke, D, Kumaran, S, Kobychev, V, Korga, G, Lachenmaier, T, Lasserre, T, Laubenstein, M, Litvinovich, E, Lombardi, P, Lomskaya, I, Ludhova, L, Lukyanchenko, G, Lukyanchenko, L, Machulin, I, Mantovani, F, Manuzio, G, Marcocci, S, Maricic, J, Martyn, J, Meroni, E, Meyer, M, Miramonti, L, Misiaszek, M, Montuschi, M, Muratova, V, Neumair, B, Nieslony, M, Oberauer, L, Onillon, A, Orekhov, V, Ortica, F, Pallavicini, M, Papp, L, Penek, O, Pietrofaccia, L, Pilipenko, N, Pocar, A, Raikov, G, Ranalli, M, Ranucci, G, Razeto, A, Re, A, Redchuk, M, Ricci, B, Romani, A, Rossi, N, Rottenanger, S, Schonert, S, Semenov, D, Skorokhvatov, M, Smirnov, O, Sotnikov, A, Strati, V, Suvorov, Y, Tartaglia, R, Testera, G, Thurn, J, Unzhakov, E, Vishneva, A, Vivier, M, Vogelaar, R, Von Feilitzsch, F, Wojcik, M, Wurm, M, Zaimidoroga, O, Zavatarelli, S, Zuber, K, Zuzel, G, Observatoire de Paris, and PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
data analysis method, Geoneutrino, FOS: Physical sciences, chemistry.chemical_element, 01 natural sciences, Mantle (geology), NO, thorium, High Energy Physics - Experiment, background [antineutrino], uranium, Physics - Geophysics, Nuclear physics, High Energy Physics - Experiment (hep-ex), statistical analysis, Lithosphere, 0103 physical sciences, antineutrino: nuclear reactor, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Particle Physics Experiments, ddc:530, 010306 general physics, geoneutrinos, liquid scintillators, low radioactivity, neutrino, detector, Borexino, [PHYS]Physics [physics], Physics, Radiogenic nuclide, 010308 nuclear & particles physics, Thorium, Crust, antineutrino: background, Mass ratio, [PHYS.PHYS.PHYS-GEN-PH]Physics [physics]/Physics [physics]/General Physics [physics.gen-ph], Geophysics (physics.geo-ph), Gran Sasso, ddc, nuclear reactor [antineutrino], geophysics [neutrino], chemistry, mass ratio, neutrino: geophysics, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], experimental results
Abstract

This paper presents a geoneutrino measurement using 3262.74 days of data taken with the Borexino detector at LNGS in Italy. By observing $52.6 ^{+9.4}_{-8.6} ({\rm stat}) ^{+2.7}_{-2.1}({\rm sys})$ geoneutrinos (68% interval) from $^{238}$U and $^{232}$Th, a signal of $47.0^{+8.4}_{-7.7}\,({\rm stat)}^{+2.4}_{-1.9}\,({\rm sys})$ TNU with $^{+18.3}_{-17.2}$% total precision was obtained. This result assumes the same Th/U mass ratio found in chondritic CI meteorites but compatible results were found when contributions from $^{238}$U and $^{232}$Th were fit as free parameters. Antineutrino background from reactors is fit unconstrained and found compatible with the expectations. The null-hypothesis of observing a signal from the mantle is excluded at a 99.0% C.L. when exploiting the knowledge of the local crust. Measured mantle signal of $21.2 ^{+9.6}_{-9.0} ({\rm stat})^{+1.1}_{-0.9} ({\rm sys})$ TNU corresponds to the production of a radiogenic heat of $24.6 ^{+11.1}_{-10.4}$ TW (68% interval) from $^{238}$U and $^{232}$Th in the mantle. Assuming 18% contribution of $^{40}$K in the mantle and $8.1^{+1.9}_{-1.4}$ TW of radiogenic heat of the lithosphere, the Borexino estimate of the total Earth radiogenic heat is $38.2 ^{+13.6}_{-12.7}$ TW, corresponding to a convective Urey ratio of 0.78$^{+0.41}_{-0.28}$. These values are compatible with different geological models, however there is a 2.4$\sigma$ tension with those which predict the lowest concentration of heat-producing elements. By fitting the data with a constraint on the reactor antineutrino background, the existence of a hypothetical georeactor at the center of the Earth having power greater than 2.4 TW at 95% C.L. is excluded. Particular attention is given to all analysis details, which should be of interest for the next generation geoneutrino measurements., Comment: 69 pages, 56 Figures (some composed of multiple files), 17 Tables, 135 References

Published
2020

48. Geo-neutrinos and Borexino

Author

Ludhova, L., Bellini, G., Benziger, J., Bick, D., Bonfini, G., Bravo, D., Caccianiga, B., Calaprice, F., Caminata, A., Cavalcante, P., Chavarria, A., Chepurnov, A., D’Angelo, D., Davini, S., Derbin, A., Empl, A., Etenko, A., Fomenko, K., Franco, D., Fiorentini, G., Galbiati, C., Gazzana, S., Ghiano, C., Giammarchi, M., Göger-Neff, M., Goretti, A., Hagner, C., Hungerford, E., Ianni, Aldo, Ianni, Andrea, Kobychev, V., Korablev, D., Korga, G., Kryn, D., Laubenstein, M., Lehnert, B., Lewke, T., Litvinovich, E., Lombardi, F., Lombardi, P., Lukyanchenko, G., Machulin, I., Manecki, S., Maneschg, W., Mantovani, F., Marcocci, S., Meindl, Q., Meroni, E., Meyer, M., Miramonti, L., Misiaszek, M., Mosteiro, P., Muratova, V., Oberauer, L., Obolensky, M., Ortica, F., Otis, K., Pallavicini, M., Papp, L., Perasso, L., Pocar, A., Ranucci, G., Razeto, A., Re, A., Ricci, B., Romani, A., Rossi, N., Saldanha, R., Salvo, C., Schönert, S., Simgen, H., Skorokhvatov, M., Smirnov, O., Sotnikov, A., Sukhotin, S., Suvorov, Y., Tartaglia, R., Testera, G., Vignaud, D., Vogelaar, R. B., von Feilitzsch, F., Wang, H., Winter, J., Wojcik, M., Wright, A., Wurm, M., Zaimidoroga, O., Zavatarelli, S., Zuber, K., and Zuzel, G.

Published
2015
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49. Solar neutrino with Borexino: Results and perspectives

Author

Smirnov, O., Bellini, G., Benziger, J., Bick, D., Bonfini, G., Bravo, D., Caccianiga, B., Calaprice, F., Caminata, A., Cavalcante, P., Chavarria, A., Chepurnov, A., D’Angelo, D., Davini, S., Derbin, A., Empl, A., Etenko, A., Fomenko, K., Franco, D., Fiorentini, G., Galbiati, C., Gazzana, S., Ghiano, C., Giammarchi, M., Göger-Neff, M., Goretti, A., Hagner, C., Hungerford, E., Ianni, Aldo, Ianni, Andrea, Kobychev, V., Korablev, D., Korga, G., Kryn, D., Laubenstein, M., Lehnert, B., Lewke, T., Litvinovich, E., Lombardi, F., Lombardi, P., Ludhova, L., Lukyanchenko, G., Machulin, I., Manecki, S., Maneschg, W., Mantovani, F., Marcocci, S., Meindl, Q., Meroni, E., Meyer, M., Miramonti, L., Misiaszek, M., Mosteiro, P., Muratova, V., Oberauer, L., Obolensky, M., Ortica, F., Otis, K., Pallavicini, M., Papp, L., Perasso, L., Pocar, A., Ranucci, G., Razeto, A., Re, A., Ricci, B., Romani, A., Rossi, N., Saldanha, R., Salvo, C., Schönert, S., Simgen, H., Skorokhvatov, M., Sotnikov, A., Sukhotin, S., Suvorov, Y., Tartaglia, R., Testera, G., Vignaud, D., Vogelaar, R. B., von Feilitzsch, F., Wang, H., Winter, J., Wojcik, M., Wright, A., Wurm, M., Zaimidoroga, O., Zavatarelli, S., Zuber, K., and Zuzel, G.

Published
2015
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50. Solar neutrino results from Borexino and main future perspectives

Author

Pallavicini, Marco, Bellini, G., Benziger, J., Bonetti, S., Buizza Avanzini, M., Caccianiga, B., Cadonati, L., Calaprice, F., Carraro, C., Chavarria, A., Dalnoki-Veress, F., D’Angelo, D., de Kerret, H., Davini, S., Derbin, A., Etenko, A., Fomenko, K., Franco, D., Galbiati, C., Gazzana, S., Giammarchi, M., Goeger-Neff, M., Goretti, A., Grieb, C., Guardincerri, E., Hardy, S., Ianni, Aldo, Ianni, Andrea, Joyce, M., Kobychev, V., Korga, G., Kryn, D., Laubenstein, M., Leung, M., Lewke, T., Litvinovich, E., Loer, B., Lombardi, P., Ludhova, L., Machulin, I., Manecki, S., Maneschg, W., Manuzio, G., Masetti, F., McCarty, K., Meindl, Q., Meroni, E., Miramonti, L., Misiaszek, M., Montanari, D., Muratova, V., Oberauer, L., Obolensky, M., Ortica, F., Pallavicini, M., Papp, L., Perasso, L., Perasso, S., Pocar, A., Raghavan, R.S., Ranucci, G., Razeto, A., Risso, P., Romani, A., Rountree, D., Sabelnikov, A., Saldanha, R., Salvo, C., Schonert, S., Simgen, H., Skorokhvatov, M., Smirnov, O., Sotnikov, A., Sukhotin, S., Suvorov, Y., Tartaglia, R., Testera, G., Vignaud, D., Vogelaar, R.B., von Feilitzsch, F., Wojcik, M., Wurm, M., Zaimidoroga, O., Zavatarelli, S., and Zuzel, G.

Published
2011
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