2020/07/31 by B. Aharmim, S. N. Ahmed, A. E. Anthony +149 · 1 citation
Physics and Astronomy · #Astrophysics #Astrophysics and Cosmic Phenomena #Energy (signal processing) #Flux (metallurgy) #Neutrino #Neutrino Physics Research #Neutrino oscillation #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum mechanics #Solar neutrino #Supernova #Type (biology) #hep-ex #nucl-ex
paper · pdf · doi:10.1103/physrevd.102.062006
published as Phys. Rev. D 102, 062006 (2020) · 11 pages, 6 figures
openalex created_date 2020/07/23 · openalex publication_date 2020/09/29 · arxiv created 2020/11/12 · arxiv updated 2020/11/16 · openalex updated_date 2026/08/05
A search has been performed for neutrinos from two sources, the hep reaction in the solar pp fusion chain and the \ensuremathνe 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\text\ensuremath-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 \mathrm\ensuremathΦhep<30\ifmmode×\else\texttimes\fi103 cm^\ensuremath-2 s^\ensuremath-1 [90% credible interval (CI)]. No events are observed in the DSNB search region, and we set an improved upper bound on the \ensuremathνe component of the DSNB flux of \mathrm\ensuremathΦ_\ensuremathνeDSNB<19 cm^\ensuremath-2 s^\ensuremath-1 (90% CI) in the energy range 22.9<E_\ensuremathν<36.9 MeV.