论文标题
对重中性瘦素的限制与单线标量相互作用
Constraints on Heavy Neutral Leptons interacting with a singlet scalar
论文作者
论文摘要
重型中性瘦素（HNLS）是标准模型的最低限度扩展，与希格斯玻色子混合的单线标量$ s $也是如此。如果两者都存在，那么HNL与$ S $互动是很自然的。对于轻单元，衰减$ n \ tosν$可以在弱的HNL衰减中占主导地位。考虑到新的衰减通道，我们重新解释了从Delphi，Charm和Belle实验中的HNL混合的现有限制。尽管这些约束通常会削弱，但在某些情况下，由于可观察到的$ s \ to \ ell^+\ ell^ - $ $损失在探测器中。此处介绍的方法可用于从其他（较旧的）实验中重铸约束，而无需诉诸于计算昂贵的蒙特卡洛模拟。此外，在没有单元的情况下，我们在对原始约束的分析中更新并纠正了一些错误。
Heavy neutral leptons (HNLs) are an attractive minimal extension of the Standard Model, as is a singlet scalar $s$ mixing with the Higgs boson. If both are present, it is natural for HNLs to interact with $s$. For a light singlet,the decay $N\to sν$ can dominate over weak HNL decays. We reinterpret existing constraints on HNL mixing from the DELPHI, CHARM and Belle experiments for 0.5-100 GeV mass HNLs, taking into account the new decay channel. Although the constraints are typically weakened, in some cases they can become stronger, due to observable $s\to\ell^+\ell^-$ decays in the detectors. The method presented here could be used to recast constraints from other (older) experiments without resorting to computationally expensive Monte Carlo simulations. In addition, we update and correct some errors in the analysis of the original constraints, in the absence of the singlet.
