Low-energy-threshold analysis of the Phase I and Phase II data sets of the Sudbury Neutrino Observatory

B. Aharmim; S. N. Ahmed; A. E. Anthony; N. Barros; E. W. Beier; A. Bellerive; B. Beltran; M. Bergevin; S. D. Biller; K. Boudjemline; M. G. Boulay; T. H. Burritt; B. Cai; Y. D. Chan; D. Chauhan; M. Chen; B. T. Cleveland; G. A. Cox; X. Dai; H. Deng; J. Detwiler; M. Dimarco; P. J. Doe; G. Doucas; P. L. Drouin; C. A. Duba; F. A. Duncan; M. Dunford; E. D. Earle; S. R. Elliott; H. C. Evans; G. T. Ewan; J. Farine; H. Fergani; F. Fleurot; R. J. Ford; J. A. Formaggio; N. Gagnon; J. Tm Goon; K. Graham; E. Guillian; S. Habib; R. L. Hahn; A. L. Hallin; E. D. Hallman; P. J. Harvey; R. Hazama; W. J. Heintzelman; J. Heise; R. L. Helmer; A. Hime; C. Howard; M. A. Howe; M. Huang; B. Jamieson; N. A. Jelley; K. J. Keeter; J. R. Klein; L. L. Kormos; M. Kos; C. Kraus; C. B. Krauss; T. Kutter; C. C.M. Kyba; J. Law; I. T. Lawson; K. T. Lesko; J. R. Leslie; I. Levine; J. C. Loach; R. MacLellan; S. Majerus; H. B. Mak; J. Maneira; R. Martin; N. McCauley; A. B. McDonald; S. McGee; M. L. Miller; B. Monreal; J. Monroe; B. Morissette; B. G. Nickel; A. J. Noble; H. M. O'Keeffe; N. S. Oblath; G. D. Orebi Gann; S. M. Oser; R. A. Ott; S. J.M. Peeters; A. W.P. Poon; G. Prior; S. D. Reitzner; K. Rielage; B. C. Robertson; R. G.H. Robertson; M. H. Schwendener; J. A. Secrest; S. R. Seibert; O. Simard; D. Sinclair; P. Skensved; T. J. Sonley; L. C. Stonehill; G. Težić; N. Tolich; T. Tsui; C. D. Tunnell; R. Van Berg; B. A. Vandevender; C. J. Virtue; B. L. Wall; D. Waller; H. Wan Chan Tseung; D. L. Wark; N. West; J. F. Wilkerson; J. R. Wilson; J. M. Wouters; A. Wright; M. Yeh; F. Zhang; K. Zuber

doi:10.1103/PhysRevC.81.055504

Low-energy-threshold analysis of the Phase I and Phase II data sets of the Sudbury Neutrino Observatory

B. Aharmim, S. N. Ahmed, A. E. Anthony, N. Barros, E. W. Beier, A. Bellerive, B. Beltran, M. Bergevin, S. D. Biller, K. Boudjemline, M. G. Boulay, T. H. Burritt, B. Cai, Y. D. Chan, D. Chauhan, M. Chen, B. T. Cleveland, G. A. Cox, X. Dai, H. DengJ. Detwiler, M. Dimarco, P. J. Doe, G. Doucas, P. L. Drouin, C. A. Duba, F. A. Duncan, M. Dunford, E. D. Earle, S. R. Elliott, H. C. Evans, G. T. Ewan, J. Farine, H. Fergani, F. Fleurot, R. J. Ford, J. A. Formaggio, N. Gagnon, J. Tm Goon, K. Graham, E. Guillian, S. Habib, R. L. Hahn, A. L. Hallin, E. D. Hallman, P. J. Harvey, R. Hazama, W. J. Heintzelman, J. Heise, R. L. Helmer, A. Hime, C. Howard, M. A. Howe, M. Huang, B. Jamieson, N. A. Jelley, K. J. Keeter, J. R. Klein, L. L. Kormos, M. Kos, C. Kraus, C. B. Krauss, T. Kutter, C. C.M. Kyba, J. Law, I. T. Lawson, K. T. Lesko, J. R. Leslie, I. Levine, J. C. Loach, R. MacLellan, S. Majerus, H. B. Mak, J. Maneira, R. Martin, N. McCauley, A. B. McDonald, S. McGee, M. L. Miller, B. Monreal, J. Monroe, B. Morissette, B. G. Nickel, A. J. Noble, H. M. O'Keeffe, N. S. Oblath, G. D. Orebi Gann, S. M. Oser, R. A. Ott, S. J.M. Peeters, A. W.P. Poon, G. Prior, S. D. Reitzner, K. Rielage, B. C. Robertson, R. G.H. Robertson, M. H. Schwendener, J. A. Secrest, S. R. Seibert, O. Simard, D. Sinclair, P. Skensved, T. J. Sonley, L. C. Stonehill, G. Težić, N. Tolich, T. Tsui, C. D. Tunnell, R. Van Berg, B. A. Vandevender, C. J. Virtue, B. L. Wall, D. Waller, H. Wan Chan Tseung, D. L. Wark, N. West, J. F. Wilkerson, J. R. Wilson, J. M. Wouters, A. Wright, M. Yeh, F. Zhang, K. Zuber

Biochemistry, Chemistry, & Physics

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Abstract

Results are reported from a joint analysis of Phase I and Phase II data from the Sudbury Neutrino Observatory. The effective electron kinetic energy threshold used is Teff=3.5 MeV, the lowest analysis threshold yet achieved with water Cherenkov detector data. In units of 106 cm^-2 s^-1, the total flux of active-flavor neutrinos from B8 decay in the Sun measured using the neutral current (NC) reaction of neutrinos on deuterons, with no constraint on the B8 neutrino energy spectrum, is found to be ΦNC=5.140-0.158+0.160(stat)-0.117+0.132(syst). These uncertainties are more than a factor of 2 smaller than previously published results. Also presented are the spectra of recoil electrons from the charged current reaction of neutrinos on deuterons and the elastic scattering of electrons. A fit to the Sudbury Neutrino Observatory data in which the free parameters directly describe the total B8 neutrino flux and the energy-dependent νe survival probability provides a measure of the total B8 neutrino flux Φ8B=5.046-0.152+0.159(stat) -0.123+0.107(syst). Combining these new results with results of all other solar experiments and the KamLAND reactor experiment yields best-fit values of the mixing parameters of θ12=34.06-0.84+1.16 degrees and Δm212=7.59-0. 21+0.20×10^-5 eV2. The global value of Φ8B is extracted to a precision of -2.95+2.38%. In a three-flavor analysis the best fit value of sin2θ13 is 2.00-1.63+2.09×10^-2. This implies an upper bound of sin2θ13<0.057 (95% C.L.).

Original language	English
Article number	055504
Journal	Physical Review C - Nuclear Physics
Volume	81
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevC.81.055504
State	Published - May 27 2010

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10.1103/PhysRevC.81.055504

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Aharmim, B., Ahmed, S. N., Anthony, A. E., Barros, N., Beier, E. W., Bellerive, A., Beltran, B., Bergevin, M., Biller, S. D., Boudjemline, K., Boulay, M. G., Burritt, T. H., Cai, B., Chan, Y. D., Chauhan, D., Chen, M., Cleveland, B. T., Cox, G. A., Dai, X., ... Zuber, K. (2010). Low-energy-threshold analysis of the Phase I and Phase II data sets of the Sudbury Neutrino Observatory. Physical Review C - Nuclear Physics, 81(5), Article 055504. https://doi.org/10.1103/PhysRevC.81.055504

@article{d4c9089a172c433aa4f11296aae6c41c,

title = "Low-energy-threshold analysis of the Phase I and Phase II data sets of the Sudbury Neutrino Observatory",

abstract = "Results are reported from a joint analysis of Phase I and Phase II data from the Sudbury Neutrino Observatory. The effective electron kinetic energy threshold used is Teff=3.5 MeV, the lowest analysis threshold yet achieved with water Cherenkov detector data. In units of 106 cm-2 s-1, the total flux of active-flavor neutrinos from B8 decay in the Sun measured using the neutral current (NC) reaction of neutrinos on deuterons, with no constraint on the B8 neutrino energy spectrum, is found to be ΦNC=5.140-0.158+0.160(stat)-0.117+0.132(syst). These uncertainties are more than a factor of 2 smaller than previously published results. Also presented are the spectra of recoil electrons from the charged current reaction of neutrinos on deuterons and the elastic scattering of electrons. A fit to the Sudbury Neutrino Observatory data in which the free parameters directly describe the total B8 neutrino flux and the energy-dependent νe survival probability provides a measure of the total B8 neutrino flux Φ8B=5.046-0.152+0.159(stat) -0.123+0.107(syst). Combining these new results with results of all other solar experiments and the KamLAND reactor experiment yields best-fit values of the mixing parameters of θ12=34.06-0.84+1.16 degrees and Δm212=7.59-0. 21+0.20×10-5 eV2. The global value of Φ8B is extracted to a precision of -2.95+2.38%. In a three-flavor analysis the best fit value of sin2θ13 is 2.00-1.63+2.09×10-2. This implies an upper bound of sin2θ13<0.057 (95% C.L.).",

author = "B. Aharmim and Ahmed, {S. N.} and Anthony, {A. E.} and N. Barros and Beier, {E. W.} and A. Bellerive and B. Beltran and M. Bergevin and Biller, {S. D.} and K. Boudjemline and Boulay, {M. G.} and Burritt, {T. H.} and B. Cai and Chan, {Y. D.} and D. Chauhan and M. Chen and Cleveland, {B. T.} and Cox, {G. A.} and X. Dai and H. Deng and J. Detwiler and M. Dimarco and Doe, {P. J.} and G. Doucas and Drouin, {P. L.} and Duba, {C. A.} and Duncan, {F. A.} and M. Dunford and Earle, {E. D.} and Elliott, {S. R.} and Evans, {H. C.} and Ewan, {G. T.} and J. Farine and H. Fergani and F. Fleurot and Ford, {R. J.} and Formaggio, {J. A.} and N. Gagnon and Goon, {J. Tm} and K. Graham and E. Guillian and S. Habib and Hahn, {R. L.} and Hallin, {A. L.} and Hallman, {E. D.} and Harvey, {P. J.} and R. Hazama and Heintzelman, {W. J.} and J. Heise and Helmer, {R. L.} and A. Hime and C. Howard and Howe, {M. A.} and M. Huang and B. Jamieson and Jelley, {N. A.} and Keeter, {K. J.} and Klein, {J. R.} and Kormos, {L. L.} and M. Kos and C. Kraus and Krauss, {C. B.} and T. Kutter and Kyba, {C. C.M.} and J. Law and Lawson, {I. T.} and Lesko, {K. T.} and Leslie, {J. R.} and I. Levine and Loach, {J. C.} and R. MacLellan and S. Majerus and Mak, {H. B.} and J. Maneira and R. Martin and N. McCauley and McDonald, {A. B.} and S. McGee and Miller, {M. L.} and B. Monreal and J. Monroe and B. Morissette and Nickel, {B. G.} and Noble, {A. J.} and O'Keeffe, {H. M.} and Oblath, {N. S.} and {Orebi Gann}, {G. D.} and Oser, {S. M.} and Ott, {R. A.} and Peeters, {S. J.M.} and Poon, {A. W.P.} and G. Prior and Reitzner, {S. D.} and K. Rielage and Robertson, {B. C.} and Robertson, {R. G.H.} and Schwendener, {M. H.} and Secrest, {J. A.} and Seibert, {S. R.} and O. Simard and D. Sinclair and P. Skensved and Sonley, {T. J.} and Stonehill, {L. C.} and G. Te{\v z}i{\'c} and N. Tolich and T. Tsui and Tunnell, {C. D.} and {Van Berg}, R. and Vandevender, {B. A.} and Virtue, {C. J.} and Wall, {B. L.} and D. Waller and {Wan Chan Tseung}, H. and Wark, {D. L.} and N. West and Wilkerson, {J. F.} and Wilson, {J. R.} and Wouters, {J. M.} and A. Wright and M. Yeh and F. Zhang and K. Zuber",

year = "2010",

month = may,

day = "27",

doi = "10.1103/PhysRevC.81.055504",

language = "English",

volume = "81",

journal = "Physical Review C - Nuclear Physics",

issn = "0556-2813",

publisher = "American Physical Society",

number = "5",

}

Aharmim, B, Ahmed, SN, Anthony, AE, Barros, N, Beier, EW, Bellerive, A, Beltran, B, Bergevin, M, Biller, SD, Boudjemline, K, Boulay, MG, Burritt, TH, Cai, B, Chan, YD, Chauhan, D, Chen, M, Cleveland, BT, Cox, GA, Dai, X, Deng, H, Detwiler, J, Dimarco, M, Doe, PJ, Doucas, G, Drouin, PL, Duba, CA, Duncan, FA, Dunford, M, Earle, ED, Elliott, SR, Evans, HC, Ewan, GT, Farine, J, Fergani, H, Fleurot, F, Ford, RJ, Formaggio, JA, Gagnon, N, Goon, JT, Graham, K, Guillian, E, Habib, S, Hahn, RL, Hallin, AL, Hallman, ED, Harvey, PJ, Hazama, R, Heintzelman, WJ, Heise, J, Helmer, RL, Hime, A, Howard, C, Howe, MA, Huang, M, Jamieson, B, Jelley, NA, Keeter, KJ, Klein, JR, Kormos, LL, Kos, M, Kraus, C, Krauss, CB, Kutter, T, Kyba, CCM, Law, J, Lawson, IT, Lesko, KT, Leslie, JR, Levine, I, Loach, JC, MacLellan, R, Majerus, S, Mak, HB, Maneira, J, Martin, R, McCauley, N, McDonald, AB, McGee, S, Miller, ML, Monreal, B, Monroe, J, Morissette, B, Nickel, BG, Noble, AJ, O'Keeffe, HM, Oblath, NS, Orebi Gann, GD, Oser, SM, Ott, RA, Peeters, SJM, Poon, AWP, Prior, G, Reitzner, SD, Rielage, K, Robertson, BC, Robertson, RGH, Schwendener, MH, Secrest, JA, Seibert, SR, Simard, O, Sinclair, D, Skensved, P, Sonley, TJ, Stonehill, LC, Težić, G, Tolich, N, Tsui, T, Tunnell, CD, Van Berg, R, Vandevender, BA, Virtue, CJ, Wall, BL, Waller, D, Wan Chan Tseung, H, Wark, DL, West, N, Wilkerson, JF, Wilson, JR, Wouters, JM, Wright, A, Yeh, M, Zhang, F & Zuber, K 2010, 'Low-energy-threshold analysis of the Phase I and Phase II data sets of the Sudbury Neutrino Observatory', Physical Review C - Nuclear Physics, vol. 81, no. 5, 055504. https://doi.org/10.1103/PhysRevC.81.055504

TY - JOUR

T1 - Low-energy-threshold analysis of the Phase I and Phase II data sets of the Sudbury Neutrino Observatory

AU - Aharmim, B.

AU - Ahmed, S. N.

AU - Anthony, A. E.

AU - Barros, N.

AU - Beier, E. W.

AU - Bellerive, A.

AU - Beltran, B.

AU - Bergevin, M.

AU - Biller, S. D.

AU - Boudjemline, K.

AU - Boulay, M. G.

AU - Burritt, T. H.

AU - Cai, B.

AU - Chan, Y. D.

AU - Chauhan, D.

AU - Chen, M.

AU - Cleveland, B. T.

AU - Cox, G. A.

AU - Dai, X.

AU - Deng, H.

AU - Detwiler, J.

AU - Dimarco, M.

AU - Doe, P. J.

AU - Doucas, G.

AU - Drouin, P. L.

AU - Duba, C. A.

AU - Duncan, F. A.

AU - Dunford, M.

AU - Earle, E. D.

AU - Elliott, S. R.

AU - Evans, H. C.

AU - Ewan, G. T.

AU - Farine, J.

AU - Fergani, H.

AU - Fleurot, F.

AU - Ford, R. J.

AU - Formaggio, J. A.

AU - Gagnon, N.

AU - Goon, J. Tm

AU - Graham, K.

AU - Guillian, E.

AU - Habib, S.

AU - Hahn, R. L.

AU - Hallin, A. L.

AU - Hallman, E. D.

AU - Harvey, P. J.

AU - Hazama, R.

AU - Heintzelman, W. J.

AU - Heise, J.

AU - Helmer, R. L.

AU - Hime, A.

AU - Howard, C.

AU - Howe, M. A.

AU - Huang, M.

AU - Jamieson, B.

AU - Jelley, N. A.

AU - Keeter, K. J.

AU - Klein, J. R.

AU - Kormos, L. L.

AU - Kos, M.

AU - Kraus, C.

AU - Krauss, C. B.

AU - Kutter, T.

AU - Kyba, C. C.M.

AU - Law, J.

AU - Lawson, I. T.

AU - Lesko, K. T.

AU - Leslie, J. R.

AU - Levine, I.

AU - Loach, J. C.

AU - MacLellan, R.

AU - Majerus, S.

AU - Mak, H. B.

AU - Maneira, J.

AU - Martin, R.

AU - McCauley, N.

AU - McDonald, A. B.

AU - McGee, S.

AU - Miller, M. L.

AU - Monreal, B.

AU - Monroe, J.

AU - Morissette, B.

AU - Nickel, B. G.

AU - Noble, A. J.

AU - O'Keeffe, H. M.

AU - Oblath, N. S.

AU - Orebi Gann, G. D.

AU - Oser, S. M.

AU - Ott, R. A.

AU - Peeters, S. J.M.

AU - Poon, A. W.P.

AU - Prior, G.

AU - Reitzner, S. D.

AU - Rielage, K.

AU - Robertson, B. C.

AU - Robertson, R. G.H.

AU - Schwendener, M. H.

AU - Secrest, J. A.

AU - Seibert, S. R.

AU - Simard, O.

AU - Sinclair, D.

AU - Skensved, P.

AU - Sonley, T. J.

AU - Stonehill, L. C.

AU - Težić, G.

AU - Tolich, N.

AU - Tsui, T.

AU - Tunnell, C. D.

AU - Van Berg, R.

AU - Vandevender, B. A.

AU - Virtue, C. J.

AU - Wall, B. L.

AU - Waller, D.

AU - Wan Chan Tseung, H.

AU - Wark, D. L.

AU - West, N.

AU - Wilkerson, J. F.

AU - Wilson, J. R.

AU - Wouters, J. M.

AU - Wright, A.

AU - Yeh, M.

AU - Zhang, F.

AU - Zuber, K.

PY - 2010/5/27

Y1 - 2010/5/27

N2 - Results are reported from a joint analysis of Phase I and Phase II data from the Sudbury Neutrino Observatory. The effective electron kinetic energy threshold used is Teff=3.5 MeV, the lowest analysis threshold yet achieved with water Cherenkov detector data. In units of 106 cm-2 s-1, the total flux of active-flavor neutrinos from B8 decay in the Sun measured using the neutral current (NC) reaction of neutrinos on deuterons, with no constraint on the B8 neutrino energy spectrum, is found to be ΦNC=5.140-0.158+0.160(stat)-0.117+0.132(syst). These uncertainties are more than a factor of 2 smaller than previously published results. Also presented are the spectra of recoil electrons from the charged current reaction of neutrinos on deuterons and the elastic scattering of electrons. A fit to the Sudbury Neutrino Observatory data in which the free parameters directly describe the total B8 neutrino flux and the energy-dependent νe survival probability provides a measure of the total B8 neutrino flux Φ8B=5.046-0.152+0.159(stat) -0.123+0.107(syst). Combining these new results with results of all other solar experiments and the KamLAND reactor experiment yields best-fit values of the mixing parameters of θ12=34.06-0.84+1.16 degrees and Δm212=7.59-0. 21+0.20×10-5 eV2. The global value of Φ8B is extracted to a precision of -2.95+2.38%. In a three-flavor analysis the best fit value of sin2θ13 is 2.00-1.63+2.09×10-2. This implies an upper bound of sin2θ13<0.057 (95% C.L.).

AB - Results are reported from a joint analysis of Phase I and Phase II data from the Sudbury Neutrino Observatory. The effective electron kinetic energy threshold used is Teff=3.5 MeV, the lowest analysis threshold yet achieved with water Cherenkov detector data. In units of 106 cm-2 s-1, the total flux of active-flavor neutrinos from B8 decay in the Sun measured using the neutral current (NC) reaction of neutrinos on deuterons, with no constraint on the B8 neutrino energy spectrum, is found to be ΦNC=5.140-0.158+0.160(stat)-0.117+0.132(syst). These uncertainties are more than a factor of 2 smaller than previously published results. Also presented are the spectra of recoil electrons from the charged current reaction of neutrinos on deuterons and the elastic scattering of electrons. A fit to the Sudbury Neutrino Observatory data in which the free parameters directly describe the total B8 neutrino flux and the energy-dependent νe survival probability provides a measure of the total B8 neutrino flux Φ8B=5.046-0.152+0.159(stat) -0.123+0.107(syst). Combining these new results with results of all other solar experiments and the KamLAND reactor experiment yields best-fit values of the mixing parameters of θ12=34.06-0.84+1.16 degrees and Δm212=7.59-0. 21+0.20×10-5 eV2. The global value of Φ8B is extracted to a precision of -2.95+2.38%. In a three-flavor analysis the best fit value of sin2θ13 is 2.00-1.63+2.09×10-2. This implies an upper bound of sin2θ13<0.057 (95% C.L.).

UR - http://www.scopus.com/inward/record.url?scp=77953305252&partnerID=8YFLogxK

U2 - 10.1103/PhysRevC.81.055504

DO - 10.1103/PhysRevC.81.055504

M3 - Article

AN - SCOPUS:77953305252

SN - 0556-2813

VL - 81

JO - Physical Review C - Nuclear Physics

JF - Physical Review C - Nuclear Physics

IS - 5

M1 - 055504

ER -

Low-energy-threshold analysis of the Phase I and Phase II data sets of the Sudbury Neutrino Observatory

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