论文标题
阿努比斯的重中性瘦素
Heavy neutral leptons at ANUBIS
论文作者
论文摘要
最近，鲍尔$ \ textit {等} $ arxiv：1909.13022提出了Anubis，该辅助检测器将安装在ATLAS或CMS交互点上方的一个轴之一中，作为搜索长寿命颗粒的工具。在这里，我们研究了该提案对最小和扩展场景中长寿命重中性瘦素（HNL）的敏感性。我们从最小的HNL模型开始，其中HNL的生产和衰减都是由主动性中微子混合介导的，然后在研究左右对称模型中研究右手中微子的情况之前。然后，我们考虑$ u（1）_ {b-l} $ SM的扩展。在此模型中，HNL是通过在理论的标量扇区中的混合而产生的。在所有情况下，我们都发现Anubis具有与所提出的Mathusla检测器相当的灵敏度。对于最小的HNL场景，从$ W $的衰减到HNL的贡献在Anubis上比Mathusla更为重要，从而扩展了对Anubis稍大的HNL群众的敏感性。
Recently Bauer $\textit{et al.}$ arXiv:1909.13022 proposed ANUBIS, an auxiliary detector to be installed in one of the shafts above the ATLAS or CMS interaction point, as a tool to search for long-lived particles. Here, we study the sensitivity of this proposal for long-lived heavy neutral leptons (HNLs) in both minimal and extended scenarios. We start with the minimal HNL model where both production and decay of the HNLs are mediated by active-sterile neutrino mixing, before studying the case of right-handed neutrinos in a left-right symmetric model. We then consider a $U(1)_{B-L}$ extension of the SM. In this model HNLs are produced from the decays of the mostly SM-like Higgs boson, via mixing in the scalar sector of the theory. In all cases, we find that ANUBIS has sensitivity reach comparable to the proposed MATHUSLA detector. For the minimal HNL scenario, the contributions from $W$'s decaying to HNLs are more important at ANUBIS than at MATHUSLA, extending the sensitivity to slightly larger HNL masses at ANUBIS.
