Electron antineutrino search at the Sudbury Neutrino Observatory

Aharmim, B. and Beier, E. W. and Bellerive, A. and Biller, S. D. and Boger, J. and Boulay, M. G. and Bowles, T. J. and Brice, S. J. and Bullard, T. V. and Cleveland, B. T. and Dai, X. and Dalnoki-Veress, F. and Doe, P. J. and Dosanjh, R. S. and Doucas, G. and Dragowsky, M. R. and Duba, C. A. and Duncan, F. A. and Dunford, M. and Dunmore, J. A. and Earle, E. D. and Evans, H. C. and Ewan, G. T. and Farine, J. and Fergani, H. and Fleurot, F. and Formaggio, J. A. and Fowler, M. M. and Frame, K. and Frati, W. and Fulsom, B. G. and Gagnon, N. and Graham, K. and Grant, D. R. and Hahn, R. L. and Hallin, A. L. and Hallman, E. D. and Hamer, A. S. and Handler, W. B. and Hargrove, C. K. and Harvey, P. J. and Hazama, R. and Heeger, K. M. and Heintzelman, W. J. and Heise, J. and Helmer, R. L. and Hemingway, R. J. and Hime, A. and Jagam, P. and Jelley, N. A. and Kormos, Laura (2004) Electron antineutrino search at the Sudbury Neutrino Observatory. Physical Review D - Particles, Fields, Gravitation and Cosmology, 70 (9). ISSN 1550-7998

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Abstract

Upper limits on the [Formula Presented] flux at the Sudbury Neutrino Observatory have been set based on the [Formula Presented] charged-current reaction on deuterium. The reaction produces a positron and two neutrons in coincidence. This distinctive signature allows a search with very low background for [Formula Presented]’s from the Sun and other potential sources. Both differential and integral limits on the [Formula Presented] flux have been placed in the energy range from 4–14.8 MeV. For an energy-independent [Formula Presented] conversion mechanism, the integral limit on the flux of solar [Formula Presented]’s in the energy range from 4–14.8 MeV is found to be [Formula Presented] (90% C.L.), which corresponds to 0.81% of the standard solar model [Formula presented] [Formula Presented] flux of [Formula Presented], and is consistent with the more sensitive limit from KamLAND in the 8.3–14.8 MeV range of [Formula Presented] (90% C.L.). In the energy range from 4–8 MeV, a search for [Formula Presented]’s is conducted using coincidences in which only the two neutrons are detected. Assuming a [Formula Presented] spectrum for the neutron induced fission of naturally occurring elements, a flux limit of [Formula Presented] (90% C.L.) is obtained.

Item Type:
Journal Article
Journal or Publication Title:
Physical Review D - Particles, Fields, Gravitation and Cosmology
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100/3101
Subjects:
ID Code:
138356
Deposited By:
Deposited On:
29 Oct 2019 04:53
Refereed?:
Yes
Published?:
Published
Last Modified:
11 Feb 2020 05:40