Search for hep solar neutrinos and the diffuse supernova neutrino background using all three phases of the Sudbury Neutrino Observatory

Authors

B. Aharmim, Laurentian University
S. N. Ahmed, Queen’s University
A. E. Anthony, The University of Texas at Austin
N. Barros, Laboratório de Instrumentacao e Física Experimental de Partículas
E. W. Beier, University of Pennsylvania
A. Bellerive, Carleton University
B. Beltran, University of Alberta
M. Bergevin, University of Guelph
S. D. Biller, University of Oxford
E. Blucher, The University of Chicago
R. Bonventre, University of California, Berkeley
K. Boudjemline, Carleton University
M. G. Boulay, Queen’s University
B. Cai, Queen’s University
E. J. Callaghan, University of California, Berkeley
J. Caravaca, University of California, Berkeley
Y. D. Chan, Lawrence Berkeley National Laboratory
D. Chauhan, Laurentian University
M. Chen, Queen’s University
B. T. Cleveland, University of Oxford
G. A. Cox, University of Washington
X. Dai, Carleton University
H. Deng, University of Pennsylvania
F. B. Descamps, University of California, Berkeley
J. A. Detwiler, Lawrence Berkeley National Laboratory
P. J. Doe, University of Washington
G. Doucas, University of Oxford
P. L. Drouin, Carleton University

Document Type

Article

Publication Date

9-29-2020

Abstract

A search has been performed for neutrinos from two sources, the hep reaction in the solar pp fusion chain and the νe component of the diffuse supernova neutrino background (DSNB), using the full dataset of the Sudbury Neutrino Observatory with a total exposure of 2.47 kton-years after fiducialization. The hep search is performed using both a single-bin counting analysis and a likelihood fit. We find a best-fit flux that is compatible with solar model predictions while remaining consistent with zero flux, and set a one-sided upper limit of φhep<30×103 cm-2 s-1 [90% credible interval (CI)]. No events are observed in the DSNB search region, and we set an improved upper bound on the νe component of the DSNB flux of φνeDSNB<19 cm-2 s-1 (90% CI) in the energy range 22.9

Publication Source (Journal or Book title)

Physical Review D

Recommended Citation

Aharmim, B., Ahmed, S., Anthony, A., Barros, N., Beier, E., Bellerive, A., Beltran, B., Bergevin, M., Biller, S., Blucher, E., Bonventre, R., Boudjemline, K., Boulay, M., Cai, B., Callaghan, E., Caravaca, J., Chan, Y., Chauhan, D., Chen, M., Cleveland, B., Cox, G., Dai, X., Deng, H., Descamps, F., Detwiler, J., Doe, P., Doucas, G., & Drouin, P. (2020). Search for hep solar neutrinos and the diffuse supernova neutrino background using all three phases of the Sudbury Neutrino Observatory. Physical Review D, 102 (6) https://doi.org/10.1103/PhysRevD.102.062006