论文标题
使用Sudbury Neutminino天文台的所有阶段
Search for $hep$ solar neutrinos and the diffuse supernova neutrino background using all three phases of the Sudbury Neutrino Observatory
论文作者
论文摘要
已经对来自两个来源的中微子进行了搜索，即太阳能$ pp $融合链中的$ hep $反应和diffuse supernova neutrino背景（DSNB）的$ν_e$组成部分，使用Sudbury Neutrino observatory的完整数据集和2.47 kton年后的sudbury neutrino observatory。 $ HEP $搜索是使用单键计数分析和可能性拟合的。我们找到与太阳模型预测兼容的最佳拟合通量，同时与零通量保持一致，并设置$φ__{hep} <30 \ times10^{3}〜\ Mathrm {cm}^{cm}^{ - 2}〜}〜\ mathrm {s}^s} = 90％的单方面上限。在DSNB搜索区域中没有观察到任何事件，我们将DSNB通量的$ν_e$组成部分设置为$φ^\ mathrm {dSnb} _ {ν_e} <19〜 \ 19〜 \ textrm {cm}^cm}^{-2}^{ - 2}〜\ textrm}范围$ 22.9 <E_ν<36.9 $ 〜Mev。
A search has been performed for neutrinos from two sources, the $hep$ reaction in the solar $pp$ fusion chain and the $ν_e$ 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 $Φ_{hep} < 30\times10^{3}~\mathrm{cm}^{-2}~\mathrm{s}^{-1}$ [90% credible interval (CI)]. No events are observed in the DSNB search region, and we set an improved upper bound on the $ν_e$ component of the DSNB flux of $Φ^\mathrm{DSNB}_{ν_e} < 19~\textrm{cm}^{-2}~\textrm{s}^{-1}$ (90% CI) in the energy range $22.9 < E_ν< 36.9$~MeV.
