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Start Over Author "C. Ghiano" Publisher american physical society (aps)
6 results on '"C. Ghiano"'

1. Improved measurement of B8 solar neutrinos with 1.5 kt·y of Borexino exposure

Author

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

Subjects
Physics, Elastic scattering, Particle physics, Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, Solar neutrino, Solar neutrino problem, 01 natural sciences, Nuclear physics, Neutrino detector, 0103 physical sciences, Measurements of neutrino speed, High Energy Physics::Experiment, Neutrino, 010306 general physics, Neutrino oscillation, Borexino
Abstract

We report on an improved measurement of the $^8$B solar neutrino interaction rate with the Borexino experiment at the Laboratori Nazionali del Gran Sasso. Neutrinos are detected via their elastic scattering on electrons in a large volume of liquid scintillator. The measured rate of scattered electrons above 3 MeV of energy is $0.223\substack{+0.015 \\ -0.016}\,(stat)\,\substack{+0.006 \\ -0.006}\,(syst)$ cpd/100 t, which corresponds to an observed solar neutrino flux assuming no neutrino flavor conversion of $\Phi\substack{\rm ES \\ ^8\rm B}=2.57\substack{+0.17 \\ -0.18}(stat)\substack{+0.07\\ -0.07}(syst)\times$10$^6$ cm$^{-2}\,$s$^{-1}$. This measurement exploits the active volume of the detector in almost its entirety for the first time, and takes advantage of a reduced radioactive background following the 2011 scintillator purification campaign and of novel analysis tools providing a more precise modeling of the background. Additionally, we set a new limit on the interaction rate of solar $hep$ neutrinos, searched via their elastic scattering on electrons as well as their neutral current-mediated inelastic scattering on carbon, $^{12}$C($\nu,\nu'$)$^{12}$C* ($E_{\gamma}$= 15.1 MeV).

Published
2020

2. Limiting neutrino magnetic moments with Borexino Phase-II solar neutrino data

Author

Y. Suvorov, S. Davini, R. B. Vogelaar, J. Martyn, E. Litvinovich, I. N. Machulin, Matthias Laubenstein, N. Rossi, M. Carlini, D. A. Semenov, Marco Pallavicini, L. Lukyanchenko, M. D. Skorokhvatov, S. Caprioli, B. Opitz, D. D'Angelo, O. Zaimidoroga, H. Wang, Aldo Ianni, Michael Wurm, Z. Bagdasarian, Kai Zuber, S. Weinz, Xuefeng Ding, B. Neumair, T. Houdy, G. Korga, S. Appel, F. Froborg, K. Fomenko, L. Papp, G. Lukyanchenko, E. Meroni, V. V. Kobychev, C. Ghiano, G. Bellini, A. M. Goretti, Fausto Ortica, Caren Hagner, Z. Yokley, D. Guffanti, V. Atroshchenko, M. Redchuk, Aldo Romani, L.F.F. Stokes, I. S. Drachnev, Matteo Agostini, Marcin Wójcik, Andrey Formozov, N. Pilipenko, D. Franco, P. Cavalcante, D. Kryn, A. Di Ludovico, L. Di Noto, Jay Burton Benziger, Alessandra Re, G. Manuzio, M. S. Meyer, M. Misiaszek, F. von Feilitzsch, A. Vishneva, Lothar Oberauer, O. Smirnov, V. Orekhov, V. N. Muratova, B. Caccianiga, E. V. Unzhakov, D. Bravo, Paolo Lombardi, K. Choi, Lino Miramonti, M. Gromov, A. Pocar, D. Jeschke, D. Basilico, G. Bonfini, F. Lombardi, A. V. Derbin, A. Razeto, J. Thurn, R. Tartaglia, R. Roncin, Frank Calaprice, Marco Giammarchi, Ö. Penek, G. Testera, C. Galbiati, Livia Ludhova, A. S. Chepurnov, Denis Korablev, E. V. Hungerford, A. Sotnikov, S. Schönert, Andrea Ianni, D. Bick, Sandra Zavatarelli, A. Porcelli, Gioacchino Ranucci, A. Caminata, G. Zuzel, F. Gabriele, A. Jany, K. Altenmüller, S. Marcocci, M. Toropova, L. Collica, 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, 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, A, 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, Suvorov, Y, Tartaglia, R, Testera, G, Thurn, J, Toropova, M, Unzhakov, E, Vishneva, A, Vogelaar, R, Von Feilitzsch, F, Wang, H, Weinz, S, Wojcik, M, Wurm, M, Yokley, Z, Zaimidoroga, O, Zavatarelli, S, Zuber, K, Zuzel, G, AstroParticule et Cosmologie (APC (UMR_7164)), Observatoire de Paris, 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), Borexino, 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 Paris Cité (UPCité), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), 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., Altenmueller, 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., Schoenert, 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., Zuzel, G., AstroParticule et Cosmologie ( APC - UMR 7164 ), and Centre National de la Recherche Scientifique ( CNRS ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Observatoire de Paris-Université Paris Diderot - Paris 7 ( UPD7 ) -Commissariat à l'énergie atomique et aux énergies alternatives ( CEA )

Subjects
Physics and Astronomy (miscellaneous), neutrino: solar, Physics::Instrumentation and Detectors, Solar neutrino, 01 natural sciences, High Energy Physics - Experiment, Neutrino detector, High Energy Physics - Experiment (hep-ex), SPIN ROTATION, High Energy Physics - Phenomenology (hep-ph), electron: recoil, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Astrophysics::Solar and Stellar Astrophysics, Borexino, S066MGM, gallium, Physics, Magnetic moment, neutrino: magnetic moment, High Energy Physics - Phenomenology, neutrino: moment, neutrino: flavor, neutrino: Majorana, Measurements of neutrino speed, Neutrino, upper limit, Particle physics, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, DECAYS, Nuclear physics, statistical analysis, [ PHYS.HEXP ] Physics [physics]/High Energy Physics - Experiment [hep-ex], 0103 physical sciences, ddc:530, 010306 general physics, Neutrino oscillation, DETECTOR, ELECTROMAGNETIC PROPERTIES, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Solar neutrino problem, MAJORANA NEUTRINOS, [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], electron: energy spectrum, [ PHYS.HPHE ] Physics [physics]/High Energy Physics - Phenomenology [hep-ph], High Energy Physics::Experiment, experimental results
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 $\mu_{\nu}^{eff}$ $, Comment: 7 pages, 2 figures

Published
2017

3. New limits on heavy sterile neutrino mixing inB8decay obtained with the Borexino detector

Author

A. M. Goretti, Aldo Ianni, Anton Empl, R. Tartaglia, S. V. Sukhotin, A. Wright, O. Zaimidoroga, A.V. Etenko, Jingke Xu, S. Schönert, Cristiano Galbiati, D. Bravo, V. V. Kobychev, E. V. Hungerford, C. Ghiano, Caren Hagner, P. Cavalcante, I. S. Drachnev, M. Misiaszek, W. Maneschg, P. J. Mosteiro, A. Sotnikov, Gioacchino Ranucci, Laura Cadonati, L. Papp, G. Bellini, D. Franco, M. D. Skorokhvatov, Michael Wurm, L. Grandi, Lothar Oberauer, Paolo Lombardi, Fausto Ortica, Matthias Laubenstein, B. Caccianiga, Andrea Ianni, D. Bick, Sandra Zavatarelli, Y. Suvorov, T. Lewke, D. Kryn, A. V. Derbin, F. Lombardi, Ben Loer, M. Obolensky, Q. Meindl, A. Razeto, G. Lukyanchenko, A. E. Chavarria, L. Perasso, S. Manecki, E. Meroni, M. Buizza Avanzini, V. N. Muratova, S. Gazzana, Lino Miramonti, S. Davini, G. Zuzel, E. Litvinovich, C. Salvo, G. Korga, K. Fomenko, D. Vignaud, N. Rossi, G. Manuzio, G. Bonfini, F. von Feilitzsch, Frank Calaprice, Hardy Simgen, R. Saldanha, J. Winter, M. Göger-Neff, Marco Giammarchi, A. Pocar, O. Smirnov, K. Otis, S. Perasso, M. M. Wojcik, Aldo Romani, Jay Burton Benziger, I. N. Machulin, Livia Ludhova, A. S. Chepurnov, Marco Pallavicini, D. D'Angelo, Denis Korablev, G. Testera, Alessandra Re, and R. B. Vogelaar

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Sterile neutrino, 010308 nuclear & particles physics, 7. Clean energy, 01 natural sciences, Side branch, 0103 physical sciences, High Energy Physics::Experiment, Heavy neutrino, Neutrino, 010306 general physics, Mixing (physics), Borexino
Abstract

If heavy neutrinos with mass ${m}_{{\ensuremath{\nu}}_{H}}\ensuremath{\ge}2{m}_{e}$ are produced in the Sun via the decay $^{8}\mathrm{B}\ensuremath{\rightarrow}^{8}\mathrm{Be}+{e}^{+}+{\ensuremath{\nu}}_{H}$ in a side branch of the $pp$ chain, they would undergo the observable decay into an electron, a positron and a light neutrino ${\ensuremath{\nu}}_{H}\ensuremath{\rightarrow}{\ensuremath{\nu}}_{L}+{e}^{+}+{e}^{\ensuremath{-}}$. 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 $1.5\text{ }\text{ }\mathrm{MeV}\ensuremath{\le}{m}_{{\ensuremath{\nu}}_{H}}\ensuremath{\le}14\text{ }\text{ }\mathrm{MeV}$ to be $|{U}_{eH}{|}^{2}\ensuremath{\le}({10}^{\ensuremath{-}3}\ensuremath{-}4\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}6})$, respectively. These are tighter limits on the mixing parameters than obtained in previous experiments at nuclear reactors and accelerators.

Published
2013

4. Search for solar axions produced in thep(d,He3)Areaction with Borexino detector

Author

D. Vignaud, M. D. Skorokhvatov, Michael Wurm, L. Grandi, Y. Suvorov, Livia Ludhova, A. M. Goretti, R. B. Vogelaar, Q. Meindl, Matthias Laubenstein, O. Smirnov, A. Kobychev, Denis Korablev, I. N. Machulin, Aldo Ianni, Alessandra Re, K. Otis, L. Lewke, G. Bonfini, G. Korga, K. Fomenko, M. Buizza Avanzini, Marco Pallavicini, D. D'Angelo, Frank Calaprice, R. Tartaglia, G. Bellini, Jingke Xu, Hardy Simgen, P. A. Romani, S. Hardy, E. Meroni, Cristiano Galbiati, S. Manecki, C. Carraro, W. Maneschg, M. Obolensky, J. Winter, S. Davini, G. Testera, D. Kryn, Lino Miramonti, S. Gazzana, A. Pocar, F. von Feilitzsch, R. S. Raghavan, G. Manuzio, Lothar Oberauer, B. Caccianiga, M. Goeger-Neff, M. M. Wojcik, C. Ghiano, E. Litvinovich, A. A. Sabelnikov, Laura Cadonati, L. Papp, Jay Burton Benziger, A. V. Derbin, P. Cavalcante, D. Franco, Fausto Ortica, M. Misiaszek, A. Kayunov, E. Guardincerri, S. Perasso, B. Loer, Paolo Lombardi, S. V. Sukhotin, G. Zuzel, Yusuke Koshio, A. Wright, O. Zaimidoroga, Gioacchino Ranucci, A. Sotnikov, F. Lombardi, A. Razeto, V. N. Muratova, C. Salvo, D. Montanari, A.V. Etenko, D. Bravo, P. J. Mosteiro, A. E. Chavarria, L. Perasso, R. Saldanha, S. Schönert, Marco Giammarchi, Andrea Ianni, D. Bick, and Sandra Zavatarelli

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Isovector, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Inverse, 7. Clean energy, 01 natural sciences, 0103 physical sciences, Nuclear Experiment, 010306 general physics, Axion, Borexino
Abstract

A search for 5.5 MeV solar axions produced in the $p+d\ensuremath{\rightarrow}^{3}\mathrm{He}+\mathrm{A}$ (5.5 MeV) reaction was performed using the Borexino detector. The Compton conversion of axions to photons, $\mathrm{A}+e\ensuremath{\rightarrow}e+\ensuremath{\gamma}$; the axioelectric effect, $\mathrm{A}+e+Z\ensuremath{\rightarrow}e+Z$; the decay of axions into two photons, $\mathrm{A}\ensuremath{\rightarrow}2\ensuremath{\gamma}$; and inverse Primakoff conversion on nuclei, $\mathrm{A}+Z\ensuremath{\rightarrow}\ensuremath{\gamma}+Z$, are considered. Model-independent limits on axion-electron (${g}_{Ae}$), axion-photon (${g}_{A\ensuremath{\gamma}}$), and isovector axion-nucleon (${g}_{3AN}$) couplings are obtained: $|{g}_{Ae}\ifmmode\times\else\texttimes\fi{}{g}_{3AN}|\ensuremath{\le}5.5\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}13}$ and $|{g}_{A\ensuremath{\gamma}}\ifmmode\times\else\texttimes\fi{}{g}_{3AN}|\ensuremath{\le}4.6\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}11}\text{ }\text{ }{\mathrm{GeV}}^{\ensuremath{-}1}$ at ${m}_{A}l1\text{ }\text{ }\mathrm{MeV}$ (90% confidence level). These limits are 2--4 orders of magnitude stronger than those obtained in previous laboratory-based experiments using nuclear reactors and accelerators.

Published
2012

5. Measurement of the solarB8neutrino rate with a liquid scintillator target and 3 MeV energy threshold in the Borexino detector

Author

Livia Ludhova, A. M. Goretti, A. S. Chepurnov, G. Testera, S. Manecki, R. S. Raghavan, G. Manuzio, Matthias Laubenstein, M. Obolensky, Jay Burton Benziger, E. Meroni, S. Davini, S. Hardy, B. Ricci, T. Lewke, I. N. Machulin, M. D. Skorokhvatov, Michael Wurm, Lothar Oberauer, P. Risso, S. V. Sukhotin, M. Goeger-Neff, Stefano Bonetti, A. Wright, O. Zaimidoroga, Marco Pallavicini, Aldo Ianni, E. Litvinovich, D. D'Angelo, D. Franco, F. Dalnoki-Veress, F. von Feilitzsch, F. Ortica, D. Kryn, Q. Meindl, G. Bellini, D. Rountree, A. Romani, C. Carraro, Paolo Lombardi, R. B. Vogelaar, H. de Kerret, R. Tartaglia, Jingke Xu, Cristiano Galbiati, G. Korga, K. Fomenko, Laura Cadonati, L. Papp, S. Gazzana, R. Saldanha, Lino Miramonti, Marco Giammarchi, W. Maneschg, Michael K.H. Leung, Alessandra Re, M. Buizza Avanzini, B. Caccianiga, Frank Calaprice, Hardy Simgen, D. Vinaud, Andrea Ianni, O. Smirnov, Sandra Zavatarelli, S. Schönert, Marcin Wójcik, A. Sotnikov, V. N. Muratova, A. Pocar, D. Montanari, G. Zuzel, Gioacchino Ranucci, Y. Suvorov, A. E. Chavarria, L. Perasso, C. Salvo, A.V. Etenko, A. Razeto, E. Gurdincerri, B. Loer, A. A. Sabelnikov, Yusuke Koshio, A. V. Derbin, S. Perasso, J. Winter, Malcolm J. Joyce, C. Ghiano, and M. Misiaszek

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, Solar neutrino, 01 natural sciences, 7. Clean energy, Nuclear physics, Neutrino detector, 13. Climate action, 0103 physical sciences, High Energy Physics::Experiment, Astrophysics::Earth and Planetary Astrophysics, Neutrino, 010306 general physics, Neutrino oscillation, Isotopes of beryllium, Energy (signal processing), Borexino, Lepton
Abstract

We report the measurement of {nu}-e elastic scattering from {sup 8}B solar neutrinos with 3 MeV energy threshold by the Borexino detector in Gran Sasso (Italy). The rate of solar neutrino-induced electron scattering events above this energy in Borexino is 0.22{+-}0.04(stat){+-}0.01(syst) cpd/100 t, which corresponds to {Phi}{sub {sup 8}B}{sup ES}=2.4{+-}0.4{+-}0.1x10{sup 6} cm{sup -2} s{sup -1}, in good agreement with measurements from SNO and SuperKamiokaNDE. Assuming the {sup 8}B neutrino flux predicted by the high metallicity standard solar model, the average {sup 8}B {nu}{sub e} survival probability above 3 MeV is measured to be 0.29{+-}0.10. The survival probabilities for {sup 7}Be and {sup 8}B neutrinos as measured by Borexino differ by 1.9{sigma}. These results are consistent with the prediction of the MSW-LMA solution of a transition in the solar {nu}{sub e} survival probability P{sub ee} between the low-energy vacuum-driven and the high-energy matter-enhanced solar neutrino oscillation regimes.

Published
2010

6. New experimental limits on the Pauli-forbidden transitions inC12nuclei obtained with485days Borexino data

Author

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

Subjects
Physics, Nuclear and High Energy Physics, Antiparticle, Particle physics, 010308 nuclear & particles physics, Hadron, Carbon-12, Elementary particle, Fermion, 01 natural sciences, 7. Clean energy, Baryon, 0103 physical sciences, 010306 general physics, Nucleon, Lepton
Abstract

The Pauli exclusion principle (PEP) has been tested for nucleons ($n,p$) in $^{12}C$ with the Borexino detector.The approach consists of a search for $\gamma$, $n$, $p$ and $\beta^\pm$ emitted in a non-Paulian transition of 1$P_{3/2}$- shell nucleons to the filled 1$S_{1/2}$ shell in nuclei. Due to the extremely low background and the large mass (278 t) of the Borexino detector, the following most stringent up-to-date experimental bounds on PEP violating transitions of nucleons have been established: $\tau({^{12}\rm{C}}\to{^{12}\widetilde{\rm{C}}}+\gamma) \geq 5.0\cdot10^{31}$ y, $\tau({^{12}\rm{C}}\to{^{11}\widetilde{\rm{B}}}+ p) \geq 8.9\cdot10^{29}$ y, $\tau({^{12}\rm{C}}\to{^{11}\widetilde{\rm{C}}}+ n) \geq 3.4 \cdot 10^{30}$ y, $\tau({^{12}\rm{C}}\to{^{12}\widetilde{\rm{N}}}+ e^- + \widetilde{\nu_e}) \geq 3.1\cdot 10^{30}$ y and $\tau({^{12}\rm{C}}\to{^{12}\widetilde{\rm{B}}}+ e^+ + \nu_e) \geq 2.1 \cdot 10^{30}$ y, all at 90% C.L. The corresponding upper limits on the relative strengths for the searched non-Paulian electromagnetic, strong and weak transitions have been estimated: $\delta^2_{\gamma} \leq 2.2\cdot10^{-57}$, $\delta^2_{N} \leq 4.1\cdot10^{-60}$ and $\delta^2_{\beta} \leq 2.1\cdot10^{-35}$.

Published
2010

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