Nick Jelley: Publications

Direct evidence for neutrino flavor transformation from neutral-current interactions in the Sudbury Neutrino Observatory.

Phys Rev Lett 89:1 (2002) 011301

Authors:

QR Ahmad, RC Allen, TC Andersen, J D Anglin, JC Barton, EW Beier, M Bercovitch, J Bigu, SD Biller, RA Black, I Blevis, RJ Boardman, J Boger, E Bonvin, MG Boulay, MG Bowler, TJ Bowles, SJ Brice, MC Browne, TV Bullard, G Bühler, J Cameron, YD Chan, HH Chen, M Chen, X Chen, BT Cleveland, ETH Clifford, JHM Cowan, DF Cowen, GA Cox, X Dai, F Dalnoki-Veress, WF Davidson, PJ Doe, G Doucas, MR Dragowsky, CA Duba, FA Duncan, M Dunford, JA Dunmore, ED Earle, SR Elliott, HC Evans, GT Ewan, J Farine, H Fergani, AP Ferraris, RJ Ford, JA Formaggio, MM Fowler, K Frame, ED Frank, W Frati, N Gagnon, JV Germani, S Gil, K Graham, DR Grant, RL Hahn, AL Hallin, ED Hallman, AS Hamer, AA Hamian, WB Handler, RU Haq, CK Hargrove, PJ Harvey, R Hazama, KM Heeger, WJ Heintzelman, J Heise, RL Helmer, JD Hepburn, H Heron, J Hewett, A Hime, M Howe, JG Hykawy, MCP Isaac, P Jagam, NA Jelley, C Jillings, G Jonkmans, K Kazkaz, PT Keener, JR Klein, AB Knox, RJ Komar, R Kouzes, T Kutter, CCM Kyba, J Law, IT Lawson, M Lay, HW Lee, KT Lesko, JR Leslie, I Levine, W Locke, S Luoma, J Lyon, S Majerus, HB Mak, J Maneira, J Manor, AD Marino, N McCauley, AB McDonald, DS McDonald, K McFarlane, G McGregor, R Meijer Drees, C Mifflin, GG Miller, G Milton, BA Moffat, M Moorhead, CW Nally, MS Neubauer, FM Newcomer, HS Ng, AJ Noble, EB Norman, VM Novikov, M O'Neill, CE Okada, RW Ollerhead, M Omori, JL Orrell, SM Oser, AWP Poon, TJ Radcliffe, A Roberge, BC Robertson, RGH Robertson, SSE Rosendahl, JK Rowley, VL Rusu, E Saettler, KK Schaffer, MH Schwendener, A Schülke, H Seifert, M Shatkay, JJ Simpson, CJ Sims, D Sinclair, P Skensved, AR Smith, MWE Smith, T Spreitzer, N Starinsky, TD Steiger, RG Stokstad, LC Stonehill, RS Storey, B Sur, R Tafirout, N Tagg, NW Tanner, RK Taplin, M Thorman, PM Thornewell, PT Trent, YI Tserkovnyak, R Van Berg, RG Van de Water, CJ Virtue, CE Waltham, J-X Wang, DL Wark, N West, JB Wilhelmy, JF Wilkerson, JR Wilson, P Wittich, JM Wouters, M Yeh, SNO Collaboration. Sudbury Neutrino Observatory

Abstract:

Observations of neutral-current nu interactions on deuterium in the Sudbury Neutrino Observatory are reported. Using the neutral current (NC), elastic scattering, and charged current reactions and assuming the standard 8B shape, the nu(e) component of the 8B solar flux is phis(e) = 1.76(+0.05)(-0.05)(stat)(+0.09)(-0.09)(syst) x 10(6) cm(-2) s(-1) for a kinetic energy threshold of 5 MeV. The non-nu(e) component is phi(mu)(tau) = 3.41(+0.45)(-0.45)(stat)(+0.48)(-0.45)(syst) x 10(6) cm(-2) s(-1), 5.3sigma greater than zero, providing strong evidence for solar nu(e) flavor transformation. The total flux measured with the NC reaction is phi(NC) = 5.09(+0.44)(-0.43)(stat)(+0.46)(-0.43)(syst) x 10(6) cm(-2) s(-1), consistent with solar models.

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Measurement of Day and Night Neutrino Energy Spectra at SNO and Constraints on Neutrino Mixing Parameters

Physical Review Letters 89 (2002) 011302 5pp

Authors:

SD Biller, Q.R. Ahmad, R.C. Allen, T.C. Anderson

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Measurement of the rate of nu(e) + d --> p + p + e(-) interactions produced by (8)B solar neutrinos at the Sudbury Neutrino Observatory.

Phys Rev Lett 87:7 (2001) 071301

Authors:

QR Ahmad, RC Allen, TC Andersen, JD Anglin, G Bühler, JC Barton, EW Beier, M Bercovitch, J Bigu, S Biller, RA Black, I Blevis, RJ Boardman, J Boger, E Bonvin, MG Boulay, MG Bowler, TJ Bowles, SJ Brice, MC Browne, TV Bullard, TH Burritt, K Cameron, J Cameron, YD Chan, M Chen, HH Chen, X Chen, MC Chon, BT Cleveland, ET Clifford, JH Cowan, DF Cowen, GA Cox, Y Dai, X Dai, F Dalnoki-Veress, WF Davidson, PJ Doe, G Doucas, MR Dragowsky, CA Duba, FA Duncan, J Dunmore, ED Earle, SR Elliott, HC Evans, GT Ewan, J Farine, H Fergani, AP Ferraris, RJ Ford, MM Fowler, K Frame, ED Frank, W Frati, JV Germani, S Gil, A Goldschmidt, DR Grant, RL Hahn, AL Hallin, ED Hallman, A Hamer, AA Hamian, RU Haq, CK Hargrove, PJ Harvey, R Hazama, R Heaton, KM Heeger, WJ Heintzelman, J Heise, RL Helmer, JD Hepburn, H Heron, J Hewett, A Hime, M Howe, JG Hykawy, MC Isaac, P Jagam, NA Jelley, C Jillings, G Jonkmans, J Karn, PT Keener, K Kirch, JR Klein, AB Knox, RJ Komar, R Kouzes, T Kutter, CC Kyba, J Law, IT Lawson, M Lay, HW Lee, KT Lesko, JR Leslie, I Levine, W Locke, MM Lowry, S Luoma, J Lyon, S Majerus, HB Mak, AD Marino, N McCauley, AB McDonald, DS McDonald, K McFarlane, G McGregor, W McLatchie, R Meijer Drees, H Mes, C Mifflin, GG Miller, G Milton, BA Moffat, M Moorhead, CW Nally, MS Neubauer, FM Newcomer, HS Ng, AJ Noble, EB Norman, VM Novikov, M O'Neill, CE Okada, RW Ollerhead, M Omori, JL Orrell, SM Oser, AW Poon, TJ Radcliffe, A Roberge, BC Robertson, RG Robertson, JK Rowley, VL Rusu, E Saettler, KK Schaffer, A Schuelke, MH Schwendener, H Seifert, M Shatkay, JJ Simpson, D Sinclair, P Skensved, AR Smith, MW Smith, N Starinsky, TD Steiger, RG Stokstad, RS Storey, B Sur, R Tafirout, N Tagg, NW Tanner, RK Taplin, M Thorman, P Thornewell, PT Trent, YI Tserkovnyak, R Van Berg, RG Van de Water, CJ Virtue, CE Waltham, JX Wang, DL Wark, N West, JB Wilhelmy, JF Wilkerson, J Wilson, P Wittich, JM Wouters, M Yeh, SNO Collaboration. Sudbury Neutrino Observatory

Abstract:

Solar neutrinos from (8)B decay have been detected at the Sudbury Neutrino Observatory via the charged current (CC) reaction on deuterium and the elastic scattering (ES) of electrons. The flux of nu(e)'s is measured by the CC reaction rate to be straight phi(CC)(nu(e)) = 1.75 +/- 0.07(stat)(+0.12)(-0.11)(syst) +/- 0.05(theor) x 10(6) cm(-2) s(-1). Comparison of straight phi(CC)(nu(e)) to the Super-Kamiokande Collaboration's precision value of the flux inferred from the ES reaction yields a 3.3 sigma difference, assuming the systematic uncertainties are normally distributed, providing evidence of an active non- nu(e) component in the solar flux. The total flux of active 8B neutrinos is determined to be 5.44+/-0.99 x 10(6) cm(-2) s(-1).

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Sudbury neutrino observatory

Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 449:1 (2000) 172-207

Authors:

J Boger, RL Hahn, JK Rowley, AL Carter, B Hollebone, D Kessler, I Blevis, F Dalnoki-Veress, A Dekok, J Farine, DR Grant, CK Hargrove, G Laberge, I Levine, K McFarlane, H Mes, AT Noble, VM Novikov, M O'Neill, M Shatkay, C Shewchuk, D Sinclair, ETH Clifford, R Deal, ED Earle, E Gaudette, G Milton, B Sur, J Bigu, JHM Cowan, DL Cluff, ED Hallman, RU Haq, J Hewett, JG Hykawy, G Jonkmans, R Michaud, A Roberge, J Roberts, E Saettler, MH Schwendener, H Seifert, D Sweezey, R Tafirout, CJ Virtue, DN Beck, YD Chan, X Chen, MR Dragowsky, FW Dycus, J Gonzalez, MCP Isaac, Y Kajiyama, GW Koehler, KT Lesko, MC Moebus, EB Norman, CE Okada, AWP Poon, P Purgalis, A Schuelke, AR Smith, RG Stokstad, S Turner, I Zlimen, JM Anaya, TJ Bowles, SJ Brice, EI Esch, MM Fowler, A Goldschmidt, A Hime, AF McGirt, GG Miller, WA Teasdale, JB Wilhelmy, JM Wouters, JD Anglin, M Bercovitch, WF Davidson, RS Storey, S Biller, RA Black, RJ Boardman, MG Bowler, J Cameron, B Cleveland, AP Ferraris, G Doucas, H Heron, C Howard, NA Jelley, AB Knox, M Lay, W Locke, J Lyon, S Majerus, M Moorhead, M Omori

Abstract:

The Sudbury Neutrino Observatory is a second-generation water Cherenkov detector designed to determine whether the currently observed solar neutrino deficit is a result of neutrino oscillations. The detector is unique in its use of D2O as a detection medium, permitting it to make a solar model-independent test of the neutrino oscillation hypothesis by comparison of the charged- and neutral-current interaction rates. In this paper the physical properties, construction, and preliminary operation of the Sudbury Neutrino Observatory are described. Data and predicted operating parameters are provided whenever possible.

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Measurements of photomultiplier single photon counting efficiency for the Sudbury Neutrino Observatory

Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 432:2-3 (1999) 364-373

Authors:

SD Biller, NA Jelley, MD Thorman, NP Fox, TH Ward

Abstract:

A knowledge of the absolute efficiency of the photomultiplier tubes (PMTs) used in the Sudbury Neutrino Observatory (SNO) is important for modelling the behaviour of the detector. While the quantum efficiencies for the PMTs are known, the efficiency in single-photon counting mode (which includes collection efficiency and counting efficiency) is of more relevance. A calibration of the 8 in. Hamamatsu R1408 photomultipliers in this mode requires a known flux of incident light at the very low level of 10-16 W cm-2 (250 photons cm-2 s-1). A method of performing such measurements, utilising the extreme linearity obtainable with silicon photodiodes, is presented in this paper. The results of efficiency measurements on four PMTs are given and a comparison is made with previous results obtained using a Cherenkov source of known intensity.

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Nick Jelley

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Direct evidence for neutrino flavor transformation from neutral-current interactions in the Sudbury Neutrino Observatory.

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Measurement of Day and Night Neutrino Energy Spectra at SNO and Constraints on Neutrino Mixing Parameters

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Measurement of the rate of nu(e) + d --> p + p + e(-) interactions produced by (8)B solar neutrinos at the Sudbury Neutrino Observatory.

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Sudbury neutrino observatory

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Measurements of photomultiplier single photon counting efficiency for the Sudbury Neutrino Observatory

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