论文标题
使用探测器附近的沙丘对重中性瘦素进行间接搜索
Indirect search of Heavy Neutral Leptons using the DUNE Near Detector
论文作者
论文摘要
我们评估了探测器附近的沙丘（Dunend）建立重型中性瘦素（HNL）的界限的潜力。这是通过研究HNL的存在如何影响主动中微子的生产率来实现的，因此，在Dunend的LARTPC中造成了中微子充电电流（CC）事件的不足。 HNL上的估计界限是针对1 eV和500 meV之间的质量计算的。我们考虑10年的操作（5个中微子和抗肿瘤模式），并获得$ | u _ {\ mu4} |^2 <9 \ 9 \ times 10^{ - 3}（4 \ times10^{ - 2} { - 2}）$ and $ | u_ | u_ {e4} | MEV和5 \％（20 \％）中微子充电当前事件率预测的总体归一化不确定性。这些限制在2（10）低于2（10）的质量区域内，比通过Dune直接搜索5 \％（20 \％）不确定性来实现的限制要好。当存在保守的20 \％的不确定性时，我们的限制只能改善$ | u_ {e4} |^2 $的当前限制，在5 eV左右的小区域中，在$ | _ _ {\ mu4} |^2 $ abor Bose of Boss Brose of Price Constraints（40 ev -1 mev）中，在$ | U _ {\ mu4} |^2 $上设置限制。
We evaluate the potential of the DUNE Near Detector (DUNEND) for establishing bounds for heavy neutral leptons (HNL). This is achieved by studying how the presence of HNLs affects the production rates of active neutrinos, therefore, creating a deficit in the neutrino charged current (CC) events at the LArTPC of the DUNEND. The estimated bounds on HNLs are calculated for masses between 1 eV and 500 MeV. We consider 10 years of operation (5 in neutrino and antineutrino mode) and obtain limits of $|U_{\mu4}|^2 < 9 \times 10^{-3} (4 \times10^{-2})$ and $|U_{e4}|^2 < 7\times10^{-3} (3 \times10^{-2})$ for masses below 10 MeV and a 5\%(20\%) overall normalization uncertainty in the neutrino charged current event rates prediction. These limits, within the region of masses below 2(10) MeV, are better than those that can be achieved by DUNE direct searches for the case of a 5\%(20\%) uncertainty. When a conservative 20\% uncertainty is present, our limits can only improve current constraints on $|U_{e4}|^2$ by up to a factor of 3 in a small region around 5 eV and set limits on $|U_{\mu4}|^2$ in a mass region free of constraints (40 eV - 1 MeV).
