Electron antineutrino search at the Sudbury Neutrino Observatory
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2004
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Abstract
Upper limits on the ν¯e flux at the Sudbury Neutrino Observatory have been set based on the ν¯e 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 ν¯e’s from the Sun and other potential sources. Both differential and integral limits on the ν¯e flux have been placed in the energy range from 4–14.8 MeV. For an energy-independent νe→ν¯e conversion mechanism, the integral limit on the flux of solar ν¯e’s in the energy range from 4–14.8 MeV is found to be Φν¯e≤3.4×104 cm−2 s−1 (90% C.L.), which corresponds to 0.81% of the standard solar model B8 νe flux of 5.05×106 cm−2 s−1, and is consistent with the more sensitive limit from KamLAND in the 8.3–14.8 MeV range of 3.7×102 cm−2 s−1 (90% C.L.). In the energy range from 4–8 MeV, a search for ν¯e’s is conducted using coincidences in which only the two neutrons are detected. Assuming a ν¯e spectrum for the neutron induced fission of naturally occurring elements, a flux limit of Φν¯e≤2.0×106 cm−2 s−1 (90% C.L.) is obtained.
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| Authors | B. Aharmim,S. N. Ahmed,E. W. Beier,A. Bellerive,S. D. Biller,J. Boger,M. G. Boulay,T. J. Bowles,S. J. Brice,T. V. Bullard,Y. D. Chan,M. Chen,X. Chen,B. T. Cleveland,G. A. Cox,X. Dai,F. Dalnoki-Veress,P. J. Doe,R. S. Dosanjh,G. Doucas,M. R. Dragowsky,C. A. Duba,F. A. Duncan,M. Dunford,J. A. Dunmore,E. D. Earle,S. R. Elliott,H. C. Evans,G. T. Ewan,J. Farine,H. Fergani,F. Fleurot,J. A. Formaggio,M. M. Fowler,K. Frame,W. Frati,B. G. Fulsom,N. Gagnon,K. Graham,D. R. Grant,R. L. Hahn,A. L. Hallin,E. D. Hallman,A. S. Hamer,W. B. Handler,C. K. Hargrove,P. J. Harvey,R. Hazama,K. M. Heeger,W. J. Heintzelman,J. Heise,R. L. Helmer,R. J. Hemingway,A. Hime,M. A. Howe,P. Jagam,N. A. Jelley,J. R. Klein,L. L. Kormos,M. S. Kos,A. Krüger,C. B. Krauss,A. V. Krumins,T. Kutter,C. C. M. Kyba,H. Labranche,R. Lange,J. Law,I. T. Lawson,K. T. Lesko,J. R. Leslie,I. Levine,S. Luoma,R. MacLellan,S. Majerus,H. B. Mak,J. Maneira,A. D. Marino,N. McCauley,A. B. McDonald,S. McGee,G. McGregor,C. Mifflin,K. K. S. Miknaitis,G. G. Miller,B. A. Moffat,C. W. Nally,M. S. Neubauer,B. G. Nickel,A. J. Noble,E. B. Norman,N. S. Oblath,C. E. Okada,R. W. Ollerhead,J. L. Orrell,S. M. Oser,C. Ouellet,S. J. M. Peeters,A. W. P. Poon,K. Rielage,B. C. Robertson,R. G. H. Robertson,E. Rollin,S. S. E. Rosendahl,V. L. Rusu,M. H. Schwendener,O. Simard,J. J. Simpson,C. J. Sims,D. Sinclair,P. Skensved,M. W. E. Smith,N. Starinsky,R. G. Stokstad,L. C. Stonehill,R. Tafirout,Y. Takeuchi,G. Tešić,M. Thomson,T. Tsui,R. Van Berg,R. G. Van de Water,C. J. Virtue,B. L. Wall,D. Waller,C. E. Waltham,H. Wan Chan Tseung,D. L. Wark,N. West,J. B. Wilhelmy,J. F. Wilkerson,J. R. Wilson,P. Wittich,J. M. Wouters,M. Yeh,K. Zuber;B. Aharmim;S. N. Ahmed;E. W. Beier;A. Bellerive;S. D. Biller;J. Boger;M. G. Boulay;T. J. Bowles;S. J. Brice;T. V. Bullard;Y. D. Chan;M. Chen;X. Chen;B. T. Cleveland;G. A. Cox;X. Dai;F. Dalnoki-Veress;P. J. Doe;R. S. Dosanjh;G. Doucas;M. R. Dragowsky;C. A. Duba;F. A. Duncan;M. Dunford;J. A. Dunmore;E. D. Earle;S. R. Elliott;H. C. Evans;G. T. Ewan;J. Farine;H. Fergani;F. Fleurot;J. A. Formaggio;M. M. Fowler;K. Frame;W. Frati;B. G. Fulsom;N. Gagnon;K. Graham;D. R. Grant;R. L. Hahn;A. L. Hallin;E. D. Hallman;A. S. Hamer;W. B. Handler;C. K. Hargrove;P. J. Harvey;R. Hazama;K. M. Heeger;W. J. Heintzelman;J. Heise;R. L. Helmer;R. J. Hemingway;A. Hime;M. A. Howe;P. Jagam;N. A. Jelley;J. R. Klein;L. L. Kormos;M. S. Kos;A. Krüger;C. B. Krauss;A. V. Krumins;T. Kutter;C. C. M. Kyba;H. Labranche;R. Lange;J. Law;I. T. Lawson;K. T. Lesko;J. R. Leslie;I. Levine;S. Luoma;R. MacLellan;S. Majerus;H. B. Mak;J. Maneira;A. D. Marino;N. McCauley;A. B. McDonald;S. McGee;G. McGregor;C. Mifflin;K. K. S. Miknaitis;G. G. Miller;B. A. Moffat;C. W. Nally;M. S. Neubauer;B. G. Nickel;A. J. Noble;E. B. Norman;N. S. Oblath;C. E. Okada;R. W. Ollerhead;J. L. Orrell;S. M. Oser;C. Ouellet;S. J. M. Peeters;A. W. P. Poon;K. Rielage;B. C. Robertson;R. G. H. Robertson;E. Rollin;S. S. E. Rosendahl;V. L. Rusu;M. H. Schwendener;O. Simard;J. J. Simpson;C. J. Sims;D. Sinclair;P. Skensved;M. W. E. Smith;N. Starinsky;R. G. Stokstad;L. C. Stonehill;R. Tafirout;Y. Takeuchi;G. Tešić;M. Thomson;T. Tsui;R. Van Berg;R. G. Van de Water;C. J. Virtue;B. L. Wall;D. Waller;C. E. Waltham;H. Wan Chan Tseung;D. L. Wark;N. West;J. B. Wilhelmy;J. F. Wilkerson;J. R. Wilson;P. Wittich;J. M. Wouters;M. Yeh;K. Zuber; |
| Journal | physical review d |
| Year | 2004 |
| DOI |
10.1103/physrevd.70.093014
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| URL | |
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