R宇称破缺与ANUBIS和MAPP上的轻中性微子
高能物理 - 唯象学
2021-04-21 v2
摘要
在R宇称破缺超对称中,最轻中性微子可以非常轻,甚至无质量。在质量范围 MeV GeV 内,中性微子可通过R宇称破缺耦合在强子碰撞中由稀有介子衰变产生,并随后衰变为更轻的介子和带电轻子。由于中性微子质量小且R宇称破缺耦合小,最轻中性微子寿命长,从而在固定靶和对撞机实验上产生位移顶点。在这项工作中,我们研究了在LHC上提出的实验ANUBIS和MAPP中的此类信号。我们还将其在这些情形下的灵敏度范围与LHC上其他现有和提出的实验(如ATLAS、CODEX-b和MATHUSLA)进行比较。我们发现ANUBIS和MAPP可展现出互补或更优的灵敏度。
引用
@article{arxiv.2008.07539,
title = {R-parity Violation and Light Neutralinos at ANUBIS and MAPP},
author = {Herbert K. Dreiner and Julian Y. Günther and Zeren Simon Wang},
journal= {arXiv preprint arXiv:2008.07539},
year = {2021}
}
备注
15 pages, 8 figures, 4 tables, v2: accepted for publication in PRD, added clarifying discussions about current bounds and scaling of RPV couplings, direct SUSY search constraints, the average neutralino velocity and the hatched region of Fig. 8, improved visibility of isocurves Fig. 7 and 8 without changing results, rectified mistake in Fig.7 for the ANUBIS isocurve (not present in Fig. 5)