论文标题
MUON抗中性抗体相互作用中的准弹性$λ$ baryon生产的首次测量
First measurement of quasi-elastic $Λ$ baryon production in muon anti-neutrino interactions in the MicroBooNE detector
论文作者
论文摘要
我们介绍了Cabibbo抑制的$λ$ BARYON生产的第一个测量，当在Fermi National Accelerator实验室暴露于主要喷油器束中的中微子时，使用微酮检测器收集的数据。分析的数据对应于$ 2.2 \ times 10^{20} $质子在中微子模式的目标上，$ 4.9 \ times 10^{20} $质子在抗中性模式的目标上运行。自动选择与手扫描相结合，前者在信号不盲时识别五个候选$λ$生产事件，这与精灵预测$ 5.3 \ pm 1.1 $事件一致。使用了几次扫描仪，选择了三到五个事件，而蒙特卡洛仿真研究的预测为$ 3.7 \ pm 1.0 $。将相位空间限制为仅包括$λ$ baryons衰减以上的Microboone的检测阈值，我们获得了$ 2.0^{+2.2} _ { - 1.7} \ times 10^{ - 40} $ 40} $ CM $ $^2/$ AR的通量平均横截面$ 2.0^{+2.2}。
We present the first measurement of the cross section of Cabibbo-suppressed $Λ$ baryon production, using data collected with the MicroBooNE detector when exposed to the neutrinos from the Main Injector beam at the Fermi National Accelerator Laboratory. The data analyzed correspond to $2.2 \times 10^{20}$ protons on target of neutrino mode running and $4.9 \times 10^{20}$ protons on target of anti-neutrino mode running. An automated selection is combined with hand scanning, with the former identifying five candidate $Λ$ production events when the signal was unblinded, consistent with the GENIE prediction of $5.3 \pm 1.1$ events. Several scanners were employed, selecting between three and five events, compared with a prediction from a blinded Monte Carlo simulation study of $3.7 \pm 1.0$ events. Restricting the phase space to only include $Λ$ baryons that decay above MicroBooNE's detection thresholds, we obtain a flux averaged cross section of $2.0^{+2.2}_{-1.7} \times 10^{-40}$ cm$^2/$Ar, where statistical and systematic uncertainties are combined.
