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Wyświetlanie 1-10 z 49
Tytuł:
Improved measurement of solar neutrinos from the carbon-nitrogen-oxygen cycle by Borexino and its implications for the standard solar model
Autorzy:
Vogelaar, R. B.
Miramonti, L.
Franco, D.
Drachnev, I.
Cavalcante, P.
Ianni, Andrea
Unzhakov, E.
Goretti, A.
Orekhov, V.
Lombardi, P.
Sotnikov, A.
Ranalli, M. T.
Korga, G.
Guffanti, D.
Vishneva, A.
Di Giacinto, A.
Misiaszek, Marcin
Razeto, A.
Kumaran, S.
Zuber, K.
Bagdasarian, Z.
Pallavicini, M.
Redchuk, M.
Wurm, M.
Bellini, G.
Penek, Ö.
Kobychev, V.
Nugmanov, R.
Basilico, D.
Martyn, J.
Di Ludovico, A.
Villante, F. L.
Biondi, R.
Semenov, D.
Settanta, G.
Ding, X. F.
Ortica, F.
Skorokhvatov, M.
Di Marcello, V.
Zuzel, Grzegorz
Gromov, M.
Ranucci, G.
Re, A.
Pelicci, L.
Tartaglia, R.
Caminata, A.
Caccianiga, B.
Oberauer, L.
Raikov, G.
Chepurnov, A.
Benziger, J.
Ghiano, C.
Schönert, S.
Singhal, A.
Pocar, A.
Papp, L.
von Feilitzsch, F.
Testera, G.
Zavatarelli, S.
Jany, Anna
Lomskaya, I.
Pilipenko, N.
Lukyanchenko, G.
Meroni, E.
Appel, S.
Ludhova, L.
Laubenstein, M.
Smirnov, O.
Wójcik, Marcin
Calaprice, F.
Pietrofaccia, L.
Di Noto, L.
Machulin, I.
Ianni, Aldo
Giammarchi, M.
Rossi, N.
D’Angelo, D.
Derbin, A.
Muratova, V.
Galbiati, C.
Göttel, A. S.
Litvinovich, E.
Opis:
We present an improved measurement of the carbon-nitrogen-oxygen (CNO) solar neutrino interaction rate at Earth obtained with the complete Borexino Phase-III dataset. The measured rate, $R_{CNO}=6.7_{-0.8}^{+2.0}$ counts (day $\times$ 100 tonnes), allows us to exclude the absence of the CNO signal with about 7$\sigma$ C.L. The correspondent CNO neutrino flux is $6.6_{-0.9}^{+2.0} \times 10^{8} cm^{-2}s^{-1}$, taking into account the neutrino flavor conversion. We use the new CNO measurement to evaluate the C and N abundances in the Sun with respect to the H abundance for the first time with solar neutrinos. Our result of $N_{CN}=(5.78_{-1.00}^{+1.86})\times 10^{-4}$ displays a ∼ 2$\sigma$ tension with the "low-metallicity" spectroscopic photospheric measurements. Furthermore, our result used together with the $^{7}Be$ and $^{8}B$ solar neutrino fluxes, also measured by Borexino, permits us to disfavor at 3.1$\sigma$ C.L. the "low-metallicity" standard solar model B16-AGSS09met as an alternative to the "high-metallicity" standard solar model B16-GS98.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
Recent Borexino results and prospects for the near future
Autorzy:
Laubenstein, M.
Pallavicini, M.
Tartaglia, R.
Bonfini, G.
Yokley, Z.
Wójcik, Marcin
Meyer, M.
D’Angelo, D.
Caminata, A.
Rossi, N.
Papp, L.
Agostini, M.
Fomenko, K.
Zavatarelli, S.
Razeto, A.
Noto, L. Di
Suvorov, Y.
Re, A.
Ludhova, L.
Bick, D.
Winter, J.
Caccianiga, B.
Toropova, M.
Benziger, J.
Sukhotin, S.
Appel, S.
Kryn, D.
Montuschi, M.
Skorokhvatov, M.
Meroni, E.
Ianni, Andrea
Unzhakov, E.
Wurm, M.
Vishneva, A.
Altenmüller, K.
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.
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.
Lehnert, B.
Derbin, A.
Galbiati, C.
Calaprice, F.
Davini, S.
Neumair, B.
Zaimidoroga, O.
Hagner, C.
Testera, G.
Misiaszek, Marcin
Kobychev, V.
Korga, G.
Semenov, D.
Ianni, Aldo
Muratova, V.
Roncin, R.
Machulin, I.
Sotnikov, A.
Hungerford, E.
Weinz, S.
Jędrzejczak, Karol
Drachnev, I.
Bellini, G.
Smirnov, O.
Zuzel, Grzegorz
Maneschg, W.
Obolensky, M.
Lukyanchenko, G.
Mosteiro, P.
Vogelaar, R. B.
Lombardi, F.
Zuber, K.
Lombardi, P.
Opis:
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.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Inne
Tytuł:
CNO and pep solar neutrino measurements and perspectives in Borexino
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 detection of neutrinos emitted in the CNO reactions in the Sun is one of the ambitious goals of Borexino Phase-II. A measurement of CNO neutrinos would be a milestone in astrophysics, and would allow to solve serious issues in current solar models. A precise measurement of the rate of neutrinos from the pep reaction would allow to investigate neutrino oscillations in the MSW transition region. The pep and CNO solar neutrino physics, the measurement in Borexino Phase-I and the perspectives for the new phase are reviewed in this proceeding.
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:
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
Wyświetlanie 1-10 z 49

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