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Tytuł:
Final results of Borexino Phase-I on low-energy solar neutrinospectroscopy
Autorzy:
Manuzio, G.
Mosteiro, P.
Fomenko, K.
Maneschg, W.
Salvo, C.
Sukhotin, S.
Wright, A.
Bick, D.
Litvinovich, E.
Obolensky, M.
Otis, K.
Wurm, M.
Vogelaar, R. B.
Davini, S.
Schoenert, S.
Lombardi, P.
Ianni, Andrea
Miramonti, L.
Ortica, F.
Empl, A.
Galbiati, C.
Franco, D.
Misiaszek, Marcin
Calaprice, F.
Korga, G.
Razeto, A.
Avanzini, M. Buizza
Wójcik, Marcin
Gabriele, F.
Gromov, M.
Smirnov, O.
Manecki, S.
Pocar, A.
Oberauer, L.
Perasso, L.
Grandi, L.
Papp, L.
Rossi, N.
Saldanha, R.
Lombardi, F.
Chavarria, A.
Derbin, A.
Cavalcante, P.
Chepurnov, A.
Sotnikov, A.
Lukyanchenko, G.
Giammarchi, M.
Testera, G.
D'Angelo, D.
Winter, J.
Muratova, V.
Laubenstein, M.
Hungerford, E.
Bonfini, G.
Pena-Garay, C.
Suvorov, Y.
Re, A.
Bellini, G.
Pallavicini, M.
Kobychev, V.
Skorokhvatov, M.
Goeger-Neff, M.
Loer, B.
Gazzana, S.
Benziger, J.
Ghiano, C.
Goretti, A.
Bravo, D.
Simgen, H.
Montuschi, M.
Vignaud, D.
Zaimidoroga, O.
Ranucci, G.
Zuzel, Grzegorz
Etenko, A.
Caccianiga, B.
Machulin, I.
von Feilitzsch, F.
Hagner, C.
Ianni, Aldo
Ludhova, L.
Korablev, D.
Meindl, Q.
Romani, A.
Tartaglia, R.
Meroni, E.
Cadonati, L.
Xu, J.
Zavatarelli, S.
Lewke, T.
Kryn, D.
Opis:
Borexino has been running since May 2007 at the Laboratori Nazionali del Gran Sasso laboratory in Italy 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 Phase-I (2007–2010), Borexino first detected and then precisely measured the flux of the $\bf{^{7}Be}$ 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 solar neutrinos produced in the CNO cycle (carbon, nitrogen, oxigen) where carbon, nitrogen, and oxygen serve as catalysts in the fusion process. 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 $\bf{^{7}Be}$ 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.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
Neutrinos from the primary proton–proton fusion process in the Sun
Autorzy:
Miramonti, L.
Franco, D.
Cavalcante, P.
Ianni, Andrea
Winter, J.
Bick, D.
Lehnert, B.
Mosteiro, P.
Goretti, A.
Lombardi, P.
Otis, K.
Sotnikov, A.
Korga, G.
Salvo, C.
Suvorov, Y.
Hungerford, E.
Misiaszek, Marcin
Razeto, A.
Zuber, K.
Sukhotin, S.
Pallavicini, M.
Wurm, M.
Bellini, G.
Romani, A.
Korablev, D.
Kobychev, V.
Kryn, D.
Lewke, T.
Meyer, M.
Wang, H.
Marcocci, S.
Ortica, F.
Cadonati, L.
Hagner, C.
Skorokhvatov, M.
Zuzel, Grzegorz
Bravo, D.
Simgen, H.
Gromov, M.
Ranucci, G.
Re, A.
Davini, S.
Empl, A.
Gabriele, F.
Vignaud, D.
Tartaglia, R.
Wright, A.
Caminata, A.
Caccianiga, B.
Oberauer, L.
Vogelaar, R. B.
Etenko, A.
Montuschi, M.
Perasso, L.
Chepurnov, A.
Benziger, J.
Ghiano, C.
Schönert, S.
Pocar, A.
Papp, L.
von Feilitzsch, F.
Meindl, Q.
Saldanha, R.
Testera, G.
Zavatarelli, S.
Lombardi, F.
Lukyanchenko, G.
Meroni, E.
Ludhova, L.
Bonfini, G.
Laubenstein, M.
Göger-Neff, M.
Smirnov, O.
Obolensky, M.
Wójcik, Marcin
Calaprice, F.
Machulin, I.
Zaimidoroga, O.
Ianni, Aldo
Giammarchi, M.
Fomenko, K.
Rossi, N.
Maneck, S.
D’Angelo, D.
Derbin, A.
Muratova, V.
Gazzana, S.
Galbiati, C.
Maneschg, W.
Chavarria, A.
Litvinovich, E.
Opis:
In the core of the Sun, energy is released through sequences of nuclear reactions that convert hydrogen into helium. The primary reaction is thought to be the fusion of two protons with the emission of a low-energy neutrino. These so-called pp neutrinos constitute nearly the entirety of the solar neutrino flux, vastly outnumbering those emitted in the reactions that follow. Although solar neutrinos from secondary processes have been observed, proving the nuclear origin of the Sun’s energy and contributing to the discovery of neutrino oscillations, those from proton–proton fusion have hitherto eluded direct detection. Here we report spectral observations of pp neutrinos, demonstrating that about 99 per cent of the power of the Sun, 3.84 $\times 10^{33}$ ergs per second, is generated by the proton–proton fusion process.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
Overview and accomplishments of the Borexino experiment
Autorzy:
Miramonti, L.
Franco, D.
Drachnev, I.
Roncin, R.
Cavalcante, P.
Ianni, Andrea
Winter, J.
Unzhakov, E.
Bick, D.
Lehnert, B.
Mosteiro, P.
Kaiser, M.
Goretti, A.
Lombardi, P.
Sotnikov, A.
Korga, G.
Noto, L. Di
Suvorov, Y.
Vishneva, A.
Hungerford, E.
Neumair, B.
Weinz, S.
Misiaszek, Marcin
Razeto, A.
Zuber, K.
Sukhotin, S.
Manecki, S.
Pallavicini, M.
Wurm, M.
Bellini, G.
Romani, A.
Korablev, D.
Kobychev, V.
Kryn, D.
Meyer, M.
Wang, H.
Marcocci, S.
Semenov, D.
Ortica, F.
Hagner, C.
Skorokhvatov, M.
Zuzel, Grzegorz
Bravo, D.
Agostini, M.
Simgen, H.
Gromov, M.
Ranucci, G.
Re, A.
Yokley, Z.
Davini, S.
Gabriele, F.
Tartaglia, R.
Caminata, A.
Caccianiga, B.
Oberauer, L.
Vogelaar, R. B.
Etenko, A.
Montuschi, M.
Jędrzejczak, Karol
Perasso, L.
Chepurnov, A.
Benziger, J.
Ghiano, C.
Schönert, S.
Pocar, A.
Papp, L.
Testera, G.
Zavatarelli, S.
Lombardi, F.
Goeger-Neff, M.
Lukyanchenko, G.
Meroni, E.
Appel, S.
Ludhova, L.
Bonfini, G.
D'Angelo, D.
Feilitzsch, F. von
Laubenstein, M.
Smirnov, O.
Obolensky, M.
Calaprice, F.
Machulin, I.
Thurn, J.
Zaimidoroga, O.
Ianni, Aldo
Giammarchi, M.
Fomenko, K.
Rossi, N.
Derbin, A.
Muratova, V.
Galbiati, C.
Toropova, M.
Maneschg, W.
Wójcik, Marcin
Litvinovich, E.
Opis:
The Borexino experiment is running at the Laboratori del Gran Sasso in Italy since 2007. Its technical distinctive feature is the unprecedented ultralow background of the inner scintillating core, which is the basis of the outstanding achievements accumulated by the experiment. In this talk, after recalling the main features of the detector, the impressive solar data gathered so far by the experiment will be summarized, with special emphasis to the most recent and prominent result concerning the detection of the fundamental pp solar neutrino flux, which is the direct probe of the engine mechanism powering our star. Such a milestone measurement puts Borexino in the unique situation of being the only experiment able to do solar neutrino spectroscopy over the entire solar spectrum; the counterpart of this peculiar status in the oscillation interpretation of the data is the capability of Borexino alone to perform the full validation across the solar energy range of the MSW-LMA paradigm. The talk will be concluded highlighting the perspectives for the final stage of the solar program of the experiment, centered on the goal to fully complete the solar spectroscopy with the missing piece of the CNO neutrinos. If successful, such a measurement would represent the final crowning of the long quest of Borexino to unravel all the properties of the neutrinos from the Sun.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Inne
Tytuł:
Measurement of Solar pp-neutrino flux with Borexino : results and implications
Autorzy:
Miramonti, L.
Franco, D.
Drachnev, I.
Roncin, R.
Cavalcante, P.
Ianni, Andrea
Winter, J.
Unzhakov, E.
Bick, D.
Lehnert, B.
Mosteiro, P.
Kaiser, M.
Goretti, A.
Lombardi, P.
Sotnikov, A.
Korga, G.
Noto, L. Di
Suvorov, Y.
Vishneva, A.
Hungerford, E.
Neumair, B.
Weinz, S.
Misiaszek, Marcin
Razeto, A.
Zuber, K.
Sukhotin, S.
Manecki, S.
Pallavicini, M.
Wurm, M.
Bellini, G.
Romani, A.
Korablev, D.
Kobychev, V.
Kryn, D.
Meyer, M.
Wang, H.
Marcocci, S.
Semenov, D.
Ortica, F.
Hagner, C.
Skorokhvatov, M.
Zuzel, Grzegorz
Bravo, D.
Agostini, M.
Simgen, H.
Gromov, M.
Ranucci, G.
Re, A.
Yokley, Z.
Davini, S.
Gabriele, F.
Tartaglia, R.
Caminata, A.
Caccianiga, B.
Oberauer, L.
Vogelaar, R. B.
Etenko, A.
Montuschi, M.
Jędrzejczak, Karol
Perasso, L.
Chepurnov, A.
Benziger, J.
Ghiano, C.
Schönert, S.
Pocar, A.
Papp, L.
Smirnov, O. Yu
Testera, G.
Zavatarelli, S.
Lombardi, F.
Goeger-Neff, M.
Lukyanchenko, G.
Meroni, E.
Appel, S.
Ludhova, L.
Bonfini, G.
D'Angelo, D.
Feilitzsch, F. von
Laubenstein, M.
Obolensky, M.
Calaprice, F.
Thurn, J.
Zaimidoroga, O.
Ianni, Aldo
Giammarchi, M.
Fomenko, K.
Rossi, N.
Derbin, A.
Muratova, V.
Galbiati, C.
Toropova, M.
Machulin, O.
Maneschg, W.
Wójcik, Marcin
Litvinovich, E.
Opis:
Measurement of the Solar pp-neutrino flux completed the measurement of Solar neutrino fluxes from the pp-chain of reactions in Borexino experiment. The result is in agreement with the prediction of the Standard Solar Model and the MSW/LMA oscillation scenario. 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 by the unknown energy sources in the Sun.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Inne
Tytuł:
First real–time detection of solar pp neutrinos by Borexino
Autorzy:
Laubenstein, M.
Pallavicini, M.
Tartaglia, R.
Bonfini, G.
Wójcik, Marcin
Otis, K.
Meyer, M.
Caminata, A.
Kayser, M.
Rossi, N.
Papp, L.
Fomenko, K.
Zavatarelli, S.
Razeto, A.
Suvorov, Y.
Saldanha, R.
Re, A.
Göger-Neff, M.
Ludhova, L.
Gazzana, S.
Bick, D.
Winter, J.
Caccianiga, B.
Benziger, J.
Sukhotin, S.
Kryn, D.
Montuschi, M.
Ianni, Al.
Skorokhvatov, M.
Meroni, E.
Wurm, M.
Vignaud, D.
Feilitzsch, F. von
Franco, D.
Perasso, L.
Manecki, S.
Bravo, D.
Wang, H.
Miramonti, L.
Ortica, F.
Simgen, H.
Schönert, S.
Giammarchi, M.
Ranucci, G.
Gabriele, F.
Marcocci, S.
Litvinovich, E.
Cavalcante, P.
Ianni, An.
Ghiano, C.
Gromov, M.
Romani, A.
Goretti, A.
Chepurnov, A.
Etenko, A.
Pocar, A.
Salvo, C.
Oberauer, L.
Lewke, T.
D'Angelo, D.
Lehnert, B.
Derbin, A.
Galbiati, C.
Calaprice, F.
Davini, S.
Zaimidoroga, O.
Hagner, C.
Testera, G.
Misiaszek, Marcin
Meindl, Q.
Kobychev, V.
Korga, G.
Muratova, V.
Chavarria, A.
Machulin, I.
Sotnikov, A.
Korablëv, D.
Hungerford, E.
Bellini, G.
Smirnov, O.
Zuzel, Grzegorz
Empl, A.
Maneschg, W.
Obolensky, M.
Lukyanchenko, G.
Mosteiro, P.
Vogelaar, R. B.
Lombardi, F.
Zuber, K.
Lombardi, P.
Opis:
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.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Inne
Tytuł:
Low-energy (anti)neutrino physics with Borexino : neutrinos from the primary proton-proton fusion process in the Sun
Autorzy:
Lewke, T.
Perasso, L.
Marcocci, S.
Salvo, C.
Ianni, An.
Pallavicini, M.
Otis, K.
D'Angelo, D.
Skorokhvatov, M.
Fomenko, K.
Kobychev, V.
Korablëv, D.
Miramonti, L.
Ludhova, L.
Vogelaar, R. B.
Galbiati, C.
Meroni, E.
Wang, H.
Sukhotin, S.
Bonfini, G.
Tartaglia, R.
Smirnov, O.
Franco, D.
Cadonati, L.
Zavatarelli, S.
Pocar, A.
Davini, S.
Caccianiga, B.
Lehnert, B.
Machulin, I.
Misiaszek, Marcin
Göger-Neff, M.
Bick, D.
Lukyanchenko, G.
Zaimidoroga, O.
Sotnikov, A.
Ghiano, C.
Saldanha, R.
Manecki, S.
Litvinovich, E.
Wójcik, Marcin
Suvorov, Y.
Hungerford, E.
Vignaud, D.
Caminata, A.
Chavarría, Á.
Rossi, N.
Empl, A.
Hagner, C.
Montuschi, M.
Calaprice, F.
von Feilitzsch, F.
Schönert, S.
Cavalcante, P.
Derbin, A.
Meindl, Q.
Gabriele, F.
Gazzana, S.
Lombardi, P.
Wright, A.
Bravo, D.
Mosteiro, P.
Meyer, M.
Winter, J.
Gromov, M.
Korga, G.
Testera, G.
Papp, L.
Romani, A.
Kryn, D.
Ranucci, G.
Ortica, F.
Chepurnov, A.
Bellini, G.
Simgen, H.
Re, A.
Zuzel, Grzegorz
Obolensky, M.
Giammarchi, M.
Oberauer, L.
Benziger, J.
Etenko, A.
Razeto, A.
Zuber, K.
Lombardi, F.
Wurm, M.
Ianni, Al.
Goretti, A.
Muratova, V.
Maneschg, W.
Laubenstein, M.
Opis:
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.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Inne
Tytuł:
Real-time detection of solar neutrinos with Borexino
Autorzy:
Laubenstein, M.
Pallavicini, M.
Tartaglia, R.
Bonfini, G.
Yokley, Z.
Wójcik, Marcin
Meyer, M.
Caminata, A.
Rossi, N.
Papp, L.
Agostini, M.
Fomenko, K.
Zavatarelli, S.
Razeto, A.
Di, Noto
Suvorov, Y.
Re, A.
Ludhova, L.
Bick, D.
Winter, J.
Caccianiga, B.
Toropova, M.
Benziger, J.
Sukhotin, S.
Carlini, M.
Appel, S.
Kryn, D.
Montuschi, M.
Skorokhvatov, M.
Meroni, E.
Unzhakov, E.
Wurm, M.
Vishneva, A.
Formozov, A.
Altenmüller, K.
Franco, D.
Perasso, L.
Manecki, S.
Bravo, D.
Wang, H.
Miramonti, L.
Ianni, A.
Ortica, F.
Simgen, H.
Schönert, S.
Giammarchi, M.
Ranucci, G.
Gabriele, F.
Litvinovich, E.
Marcocci, S.
Cavalcante, P.
Goeger-Neff, M.
Ghiano, C.
Gromov, M.
Romani, A.
Korablev, D.
Goretti, A.
Chepurnov, A.
Etenko, A.
Kaiser, M.
Pocar, A.
Oberauer, L.
Thurn, J.
D'Angelo, D.
Lehnert, B.
Jeschke, D.
Derbin, A.
Galbiati, C.
Calaprice, F.
Davini, S.
Neumair, B.
Zaimidoroga, O.
Hagner, C.
Testera, G.
Misiaszek, Marcin
Kobychev, V.
Korga, G.
Semenov, D.
Muratova, V.
Roncin, R.
Machulin, I.
Sotnikov, A.
Hungerford, E.
Weinz, S.
Jędrzejczak, Karol
Drachnev, I.
Bellini, G.
Von, Feilitzsch
Smirnov, O.
Zuzel, Grzegorz
Maneschg, W.
Obolensky, M.
Lukyanchenko, G.
Mosteiro, P.
Vogelaar, R. B.
Lombardi, F.
Zuber, K.
Lombardi, P.
Opis:
Solar neutrinos have been fundamental in the discovery of neutrino flavor oscillations and are a unique tool to probe the nuclear reactions that fuel the Sun. The Borexino experiment, located in the Gran Sasso National Laboratory, is an ultra-pure liquid scintillator detector conceived for the real time spectroscopy of low energy solar neutrinos. Thanks to its unprecedented background levels, Borexino could measure in real time the fluxes of different components of the solar neutrino spectrum, thus probing both solar neutrino oscillations and the Standard Solar Model. We review these fundamental results and also discuss the prospects for the Phase-II of Borexino, which is entering the precision era of solar neutrino measurements.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
Neutrino measurements from the Sun and Earth : results from Borexino
Autorzy:
Bellini, G.
Muratova, V.
Göger-Neff, M.
Chepurnov, A.
Cadonati, L.
Maneschg, W.
Pocar, A.
Tartaglia, R.
Schönert, S.
Korga, G.
Wang, H.
Salvo, C.
Lombardi, F.
Ianni, Aldo
Calaprice, F.
D’Angelo, D.
Wójcik, Marcin
Gazzana, S.
Ranucci, G.
Obolensky, M.
Marcocci, S.
Vogelaar, R. B.
Etenko, A.
Hagner, C.
Giammarchi, M.
Saldanha, R.
Ghiano, C.
Ianni, Andrea
Miramonti, L.
Papp, L.
Ludhova, L.
Franco, D.
Lukyanchenko, G.
Zaimidoroga, O.
Hungerford, E.
Pallavicini, M.
Meroni, E.
Goretti, A.
Bravo, D.
Empl, A.
Litvinovich, E.
Lewke, T.
Lombardi, P.
Meindl, Q.
Rossi, N.
Caccianiga, B.
Zuzel, Grzegorz
Cavalcante, P.
Davini, S.
Galbiati, C.
Vignaud, D.
Gabriele, F.
Zuber, K.
Ortica, F.
Oberauer, L.
Smirnov, O.
Fomenko, K.
Wright, A.
Otis, K.
Korablev, D.
Laubenstein, M.
Montuschi, M.
Meyer, M.
Zavatarelli, S.
Sotnikov, A.
Bonfini, G.
Suvorov, Y.
Benziger, J.
Chavarria, A.
Kryn, D.
Manecki, S.
Romani, A.
Skorokhvatov, M.
Gromov, M.
Winter, J.
Sukhotin, S.
Misiaszek, Marcin
Simgen, H.
Bick, D.
Wurm, M.
von Feilitzsch, F.
Mosteiro, P.
Perasso, L.
Razeto, A.
Re, A.
Machulin, I.
Derbin, A.
Lehnert, B.
Caminata, A.
Kobychev, V.
Testera, G.
Wydawca:
American Institute of Physics
Opis:
Important neutrino results came recently from Borexino, a massive, calorimetric liquid scintillator detector installed at the underground Gran Sasso Laboratory. With its unprecedented radiopurity levels achieved in the core of the detection medium, it is the only experiment in operation able to study in real time solar neutrino interactions in the challenging sub-MeV energy region. The recently achieved breakthrough observation of the fundamental pp flux, the precise measurement of the 7Be solar neutrino flux, and the results concerning the pep, 8B and CNO fluxes, together with their physics implications, are described in this work. Moreover, the detector has also provided a clean detection of terrestrial neutrinos, from which they emerge as a new probe of the interior of the Earth.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Inne
Wyświetlanie 1-10 z 102

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