First evidence of pep solar neutrinos by direct detection in Borexino

C. Galbiati; G. Bellini; Jay Burton Benziger; D. Bick; S. Bonetti; G. Bonfini; D. Bravo; M. Buizza Avanzini; B. Caccianiga; L. Cadonati; Frank Calaprice; C. Carraro; P. Cavalcante; A. Chavarria; D. Dangelo; S. Davini; A. Derbin; A. Etenko; K. Fomenko; D. Franco; C. Galbiati; S. Gazzana; C. Ghiano; M. Giammarchi; M. Goeger Neff; A. Goretti; L. Grandi; E. Guardincerri; S. Hardy; Aldo Ianni; Andrea Ianni; D. Korablev; G. Korga; Y. Koshio; D. Kryn; M. Laubenstein; T. Lewke; E. Litvinovich; B. Loer; F. Lombardi; P. Lombardi; L. Ludhova; I. MacHulin; S. Manecki; W. Maneschg; G. Manuzio; Q. Meindl; E. Meroni; L. Miramonti; M. Misiaszek; D. Montanari; P. Mosteiro; V. Muratova; L. Oberauer; M. Obolensky; F. Ortica; K. Otis; M. Pallavicini; L. Papp; L. Perasso; S. Perasso; A. Pocar; J. Quirk; R. S. Raghavan; G. Ranucci; A. Razeto; A. Re; A. Romani; A. Sabelnikov; R. Saldanha; C. Salvo; S. Schönert; H. Simgen; M. Skorokhvatov; O. Smirnov; A. Sotnikov; S. Sukhotin; Y. Suvorov; R. Tartaglia; G. Testera; D. Vignaud; R. B. Vogelaar; F. Von Feilitzsch; J. Winter; M. Wojcik; A. Wright; M. Wurm; J. Xu; O. Zaimidoroga; S. Zavatarelli; G. Zuzel

doi:10.1088/1742-6596/375/1/042030

First evidence of pep solar neutrinos by direct detection in Borexino

C. Galbiati, G. Bellini, Jay Burton Benziger, D. Bick, S. Bonetti, G. Bonfini, D. Bravo, M. Buizza Avanzini, B. Caccianiga, L. Cadonati, Frank Calaprice, C. Carraro, P. Cavalcante, A. Chavarria, D. Dangelo, S. Davini, A. Derbin, A. Etenko, K. Fomenko, D. FrancoC. Galbiati, S. Gazzana, C. Ghiano, M. Giammarchi, M. Goeger Neff, A. Goretti, L. Grandi, E. Guardincerri, S. Hardy, Aldo Ianni, Andrea Ianni, D. Korablev, G. Korga, Y. Koshio, D. Kryn, M. Laubenstein, T. Lewke, E. Litvinovich, B. Loer, F. Lombardi, P. Lombardi, L. Ludhova, I. MacHulin, S. Manecki, W. Maneschg, G. Manuzio, Q. Meindl, E. Meroni, L. Miramonti, M. Misiaszek, D. Montanari, P. Mosteiro, V. Muratova, L. Oberauer, M. Obolensky, F. Ortica, K. Otis, M. Pallavicini, L. Papp, L. Perasso, S. Perasso, A. Pocar, J. Quirk, R. S. Raghavan, G. Ranucci, A. Razeto, A. Re, A. Romani, A. Sabelnikov, R. Saldanha, C. Salvo, S. Schönert, H. Simgen, M. Skorokhvatov, O. Smirnov, A. Sotnikov, S. Sukhotin, Y. Suvorov, R. Tartaglia, G. Testera, D. Vignaud, R. B. Vogelaar, F. Von Feilitzsch, J. Winter, M. Wojcik, A. Wright, M. Wurm, J. Xu, O. Zaimidoroga, S. Zavatarelli, G. Zuzel

Research output: Contribution to journal › Conference article › peer-review

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Abstract

We observed, for the first time, solar neutrinos in the 1.0-1.5 MeV energy range. We determined the rate of pep solar neutrino interactions in Borexino to be 3.l±0.6_stat±0.3_syst counts/(day-100 ton). Assuming the pep neutrino flux predicted by the Standard Solar Model, we obtained a constraint on the CNO solar neutrino interaction rate of <7.9 counts/(day-100 ton) (95% C.L.). The absence of the solar neutrino signal is disfavored at 99.97% C.L., while the absence of the pep signal is disfavored at 98% C.L. The necessary sensitivity was achieved by adopting data analysis techniques for the rejection of cosmogenic ¹¹C, the dominant background in the 1-2 MeV region. Assuming the MSW-LMA solution to solar neutrino oscillations, these values correspond to solar neutrino fluxes of (1.6±0.3)×l0⁸cm^-2s^-1 and <7.7×l0⁸ cm^-2s^-1 (95% C.L.), respectively, in agreement with both the High and Low Metallicity Standard Solar Models. These results represent the first direct evidence of the pep neutrino signal and the strongest constraint of the CNO solar neutrino flux to date.

Original language	English (US)
Article number	042030
Journal	Journal of Physics: Conference Series
Volume	375
Issue number	PART 4
DOIs	https://doi.org/10.1088/1742-6596/375/1/042030
State	Published - 2012
Event	12th International Conference on Topics in Astroparticle and Underground Physics, TAUP 2011 - Munich, Germany Duration: Sep 5 2011 → Sep 9 2011

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General Physics and Astronomy

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10.1088/1742-6596/375/1/042030

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Galbiati, C., Bellini, G., Benziger, J. B., Bick, D., Bonetti, S., Bonfini, G., Bravo, D., Avanzini, M. B., Caccianiga, B., Cadonati, L., Calaprice, F., Carraro, C., Cavalcante, P., Chavarria, A., Dangelo, D., Davini, S., Derbin, A., Etenko, A., Fomenko, K., ... Zuzel, G. (2012). First evidence of pep solar neutrinos by direct detection in Borexino. Journal of Physics: Conference Series, 375(PART 4), Article 042030. https://doi.org/10.1088/1742-6596/375/1/042030

@article{9fa3ecd8d1c34cbb9ab497f67bac7fe8,

title = "First evidence of pep solar neutrinos by direct detection in Borexino",

abstract = "We observed, for the first time, solar neutrinos in the 1.0-1.5 MeV energy range. We determined the rate of pep solar neutrino interactions in Borexino to be 3.l±0.6stat±0.3syst counts/(day-100 ton). Assuming the pep neutrino flux predicted by the Standard Solar Model, we obtained a constraint on the CNO solar neutrino interaction rate of <7.9 counts/(day-100 ton) (95% C.L.). The absence of the solar neutrino signal is disfavored at 99.97% C.L., while the absence of the pep signal is disfavored at 98% C.L. The necessary sensitivity was achieved by adopting data analysis techniques for the rejection of cosmogenic 11C, the dominant background in the 1-2 MeV region. Assuming the MSW-LMA solution to solar neutrino oscillations, these values correspond to solar neutrino fluxes of (1.6±0.3)×l08cm-2s-1 and <7.7×l08 cm-2s-1 (95% C.L.), respectively, in agreement with both the High and Low Metallicity Standard Solar Models. These results represent the first direct evidence of the pep neutrino signal and the strongest constraint of the CNO solar neutrino flux to date.",

author = "C. Galbiati and G. Bellini and Benziger, {Jay Burton} and D. Bick and S. Bonetti and G. Bonfini and D. Bravo and Avanzini, {M. Buizza} and B. Caccianiga and L. Cadonati and Frank Calaprice and C. Carraro and P. Cavalcante and A. Chavarria and D. Dangelo and S. Davini and A. Derbin and A. Etenko and K. Fomenko and D. Franco and C. Galbiati and S. Gazzana and C. Ghiano and M. Giammarchi and Neff, {M. Goeger} and A. Goretti and L. Grandi and E. Guardincerri and S. Hardy and Aldo Ianni and Andrea Ianni and D. Korablev and G. Korga and Y. Koshio and D. Kryn and M. Laubenstein and T. Lewke and E. Litvinovich and B. Loer and F. Lombardi and P. Lombardi and L. Ludhova and I. MacHulin and S. Manecki and W. Maneschg and G. Manuzio and Q. Meindl and E. Meroni and L. Miramonti and M. Misiaszek and D. Montanari and P. Mosteiro and V. Muratova and L. Oberauer and M. Obolensky and F. Ortica and K. Otis and M. Pallavicini and L. Papp and L. Perasso and S. Perasso and A. Pocar and J. Quirk and Raghavan, {R. S.} and G. Ranucci and A. Razeto and A. Re and A. Romani and A. Sabelnikov and R. Saldanha and C. Salvo and S. Sch{\"o}nert and H. Simgen and M. Skorokhvatov and O. Smirnov and A. Sotnikov and S. Sukhotin and Y. Suvorov and R. Tartaglia and G. Testera and D. Vignaud and Vogelaar, {R. B.} and {Von Feilitzsch}, F. and J. Winter and M. Wojcik and A. Wright and M. Wurm and J. Xu and O. Zaimidoroga and S. Zavatarelli and G. Zuzel",

year = "2012",

doi = "10.1088/1742-6596/375/1/042030",

language = "English (US)",

volume = "375",

journal = "Journal of Physics: Conference Series",

issn = "1742-6588",

publisher = "IOP Publishing Ltd.",

number = "PART 4",

note = "12th International Conference on Topics in Astroparticle and Underground Physics, TAUP 2011 ; Conference date: 05-09-2011 Through 09-09-2011",

}

Galbiati, C, Bellini, G, Benziger, JB, Bick, D, Bonetti, S, Bonfini, G, Bravo, D, Avanzini, MB, Caccianiga, B, Cadonati, L, Calaprice, F, Carraro, C, Cavalcante, P, Chavarria, A, Dangelo, D, Davini, S, Derbin, A, Etenko, A, Fomenko, K, Franco, D, Galbiati, C, Gazzana, S, Ghiano, C, Giammarchi, M, Neff, MG, Goretti, A, Grandi, L, Guardincerri, E, Hardy, S, Ianni, A, Ianni, A, 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, Quirk, J, Raghavan, RS, 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, RB, Von Feilitzsch, F, Winter, J, Wojcik, M, Wright, A, Wurm, M, Xu, J, Zaimidoroga, O, Zavatarelli, S & Zuzel, G 2012, 'First evidence of pep solar neutrinos by direct detection in Borexino', Journal of Physics: Conference Series, vol. 375, no. PART 4, 042030. https://doi.org/10.1088/1742-6596/375/1/042030

TY - JOUR

T1 - First evidence of pep solar neutrinos by direct detection in Borexino

AU - Galbiati, C.

AU - Bellini, G.

AU - Benziger, Jay Burton

AU - Bick, D.

AU - Bonetti, S.

AU - Bonfini, G.

AU - Bravo, D.

AU - Avanzini, M. Buizza

AU - Caccianiga, B.

AU - Cadonati, L.

AU - Calaprice, Frank

AU - Carraro, C.

AU - Cavalcante, P.

AU - Chavarria, A.

AU - Dangelo, D.

AU - Davini, S.

AU - Derbin, A.

AU - Etenko, A.

AU - Fomenko, K.

AU - Franco, D.

AU - Galbiati, C.

AU - Gazzana, S.

AU - Ghiano, C.

AU - Giammarchi, M.

AU - Neff, M. Goeger

AU - Goretti, A.

AU - Grandi, L.

AU - Guardincerri, E.

AU - Hardy, S.

AU - Ianni, Aldo

AU - Ianni, Andrea

AU - Korablev, D.

AU - Korga, G.

AU - Koshio, Y.

AU - Kryn, D.

AU - Laubenstein, M.

AU - Lewke, T.

AU - Litvinovich, E.

AU - Loer, B.

AU - Lombardi, F.

AU - Lombardi, P.

AU - Ludhova, L.

AU - MacHulin, I.

AU - Manecki, S.

AU - Maneschg, W.

AU - Manuzio, G.

AU - Meindl, Q.

AU - Meroni, E.

AU - Miramonti, L.

AU - Misiaszek, M.

AU - Montanari, D.

AU - Mosteiro, P.

AU - Muratova, V.

AU - Oberauer, L.

AU - Obolensky, M.

AU - Ortica, F.

AU - Otis, K.

AU - Pallavicini, M.

AU - Papp, L.

AU - Perasso, L.

AU - Perasso, S.

AU - Pocar, A.

AU - Quirk, J.

AU - Raghavan, R. S.

AU - Ranucci, G.

AU - Razeto, A.

AU - Re, A.

AU - Romani, A.

AU - Sabelnikov, A.

AU - Saldanha, R.

AU - Salvo, C.

AU - Schönert, S.

AU - Simgen, H.

AU - Skorokhvatov, M.

AU - Smirnov, O.

AU - Sotnikov, A.

AU - Sukhotin, S.

AU - Suvorov, Y.

AU - Tartaglia, R.

AU - Testera, G.

AU - Vignaud, D.

AU - Vogelaar, R. B.

AU - Von Feilitzsch, F.

AU - Winter, J.

AU - Wojcik, M.

AU - Wright, A.

AU - Wurm, M.

AU - Xu, J.

AU - Zaimidoroga, O.

AU - Zavatarelli, S.

AU - Zuzel, G.

PY - 2012

Y1 - 2012

N2 - We observed, for the first time, solar neutrinos in the 1.0-1.5 MeV energy range. We determined the rate of pep solar neutrino interactions in Borexino to be 3.l±0.6stat±0.3syst counts/(day-100 ton). Assuming the pep neutrino flux predicted by the Standard Solar Model, we obtained a constraint on the CNO solar neutrino interaction rate of <7.9 counts/(day-100 ton) (95% C.L.). The absence of the solar neutrino signal is disfavored at 99.97% C.L., while the absence of the pep signal is disfavored at 98% C.L. The necessary sensitivity was achieved by adopting data analysis techniques for the rejection of cosmogenic 11C, the dominant background in the 1-2 MeV region. Assuming the MSW-LMA solution to solar neutrino oscillations, these values correspond to solar neutrino fluxes of (1.6±0.3)×l08cm-2s-1 and <7.7×l08 cm-2s-1 (95% C.L.), respectively, in agreement with both the High and Low Metallicity Standard Solar Models. These results represent the first direct evidence of the pep neutrino signal and the strongest constraint of the CNO solar neutrino flux to date.

AB - We observed, for the first time, solar neutrinos in the 1.0-1.5 MeV energy range. We determined the rate of pep solar neutrino interactions in Borexino to be 3.l±0.6stat±0.3syst counts/(day-100 ton). Assuming the pep neutrino flux predicted by the Standard Solar Model, we obtained a constraint on the CNO solar neutrino interaction rate of <7.9 counts/(day-100 ton) (95% C.L.). The absence of the solar neutrino signal is disfavored at 99.97% C.L., while the absence of the pep signal is disfavored at 98% C.L. The necessary sensitivity was achieved by adopting data analysis techniques for the rejection of cosmogenic 11C, the dominant background in the 1-2 MeV region. Assuming the MSW-LMA solution to solar neutrino oscillations, these values correspond to solar neutrino fluxes of (1.6±0.3)×l08cm-2s-1 and <7.7×l08 cm-2s-1 (95% C.L.), respectively, in agreement with both the High and Low Metallicity Standard Solar Models. These results represent the first direct evidence of the pep neutrino signal and the strongest constraint of the CNO solar neutrino flux to date.

UR - http://www.scopus.com/inward/record.url?scp=84865012020&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84865012020&partnerID=8YFLogxK

U2 - 10.1088/1742-6596/375/1/042030

DO - 10.1088/1742-6596/375/1/042030

M3 - Conference article

AN - SCOPUS:84865012020

SN - 1742-6588

VL - 375

JO - Journal of Physics: Conference Series

JF - Journal of Physics: Conference Series

IS - PART 4

M1 - 042030

T2 - 12th International Conference on Topics in Astroparticle and Underground Physics, TAUP 2011

Y2 - 5 September 2011 through 9 September 2011

ER -

First evidence of pep solar neutrinos by direct detection in Borexino

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