论文标题
使用微酮检测器的中性电流单$π^0 $生产的测量
Measurement of neutral current single $π^0$ production on argon with the MicroBooNE detector
论文作者
论文摘要
我们报告了$π^0 $生产的首次测量，在氩气上的中性中微子能量为$ \ lyssim1 $ 〜GEV中的中微子相互作用（NC）相互作用。我们使用来自Fermilab的助推器中微子束中的微型酮检测器的85吨活性体积液体氩时间投影室，暴露于该测量的目标。据报道，NC $π^0 $事件的测量值是针对没有充电亲的独家事件拓扑的。其中包括一个拓扑，带有来自$π^0 $的衰减的两个光子和一个质子和一个带有两个光子和零质子的拓扑。提取了每个独家拓扑结构及其半包含的组合的通量平均横截面（对两pp质子最终状态的效率校正效率），并将结果与\ \ textsc {genie}，\ textsc {neut} {neut}和\ textsc {nuwro}中心的预测进行了比较。我们的跨部分为$ 1.243 \ pm0.185 $（syst）$ \ pm0.076 $（stat），$ 0.444 \ pm0.098 \ pm0.047 $，$ 0.624 \ pm0.131 \ pm0.075 $ $ [10^{ - 38} \ textrm {cm}^2/\ textrm {ar}] $，分别分别为NC $π^0 $，独家NC $π^0 $+1p和独家NC $π^0 $+0p流程。
We report the first measurement of $π^0$ production in neutral current (NC) interactions on argon with average neutrino energy of $\lesssim1$~GeV. We use data from the MicroBooNE detector's 85-tonne active volume liquid argon time projection chamber situated in Fermilab's Booster Neutrino Beam and exposed to $5.89\times10^{20}$ protons on target for this measurement. Measurements of NC $π^0$ events are reported for two exclusive event topologies without charged pions. Those include a topology with two photons from the decay of the $π^0$ and one proton and a topology with two photons and zero protons. Flux-averaged cross-sections for each exclusive topology and for their semi-inclusive combination are extracted (efficiency-correcting for two-plus proton final states), and the results are compared to predictions from the \textsc{genie}, \textsc{neut}, and \textsc{NuWro} neutrino event generators. We measure cross sections of $1.243\pm0.185$ (syst) $\pm0.076$ (stat), $0.444\pm0.098\pm0.047$, and $0.624\pm0.131\pm0.075$ $[10^{-38}\textrm{cm}^2/\textrm{Ar}]$ for the semi-inclusive NC$π^0$, exclusive NC$π^0$+1p, and exclusive NC$π^0$+0p processes, respectively.
