Correlating gravitational waves with W-boson mass,FIMP dark matter,and Majorana seesaw mechanism  

引力波、W玻色子质量、FIMP暗物质及Majorana跷跷板机制的关联研究

作　　者：Xuewen Liu Shu-Yuan Guo Bin Zhu Ying Li 刘学文;郭书源;祝斌;李营(Department of Physics,Yantai University,Yantai 264005,China)

机构地区：[1]Department of Physics,Yantai University,Yantai 264005,China

出　　处：《Science Bulletin》2022年第14期1437-1442,M0003,共7页科学通报（英文版）

基　　金：supported by the National Natural Science Foundation of China(11805161,12005180,and 11975195);the Natural Science Foundation of Shandong Province(ZR2020QA083 and ZR2019JQ04);the Project of Shandong Province Higher Educational Science and Technology Program(2019KJJ007)。

摘　　要：We study a minimal extension of the standard model by introducing three right-handed neutrinos and a new scotogenic scalar doublet,in which the mass splittings between neutral and charged components are responsible for the W-boson mass newly measured by the CDF Collaboration.This model can not only generate non-vanishing Majorana neutrino masses via the interaction of right-handed neutrinos and scotogenic scalars,but also explain the Universe’s missing matter in the form of FIMP dark matter.We also study the influence of the mass splitting on the first order electroweak phase transition,and find that it can further enhance the transition strength and thus induce gravitational waves during the phase transition,which may be detected in the forthcoming detectors such as U-DECIGO.近期,费米实验室CDF合作组发布了最精确的W玻色子质量测量值,因其与标准模型理论预言值存在7个标准偏差,这一结果引起了国际物理学界的广泛关注.本文在scotogenic中微子模型框架中,通过引入的新标量双重态和3个右手中微子,研究并解释此热点问题.研究发现,W玻色子质量反常要求标量双重态中的中性和带电部分之间具有适当的质量劈裂,这正与以往电弱精确测量所要求的相反.基于此驱使的新的质量劈裂,作者发现其对一阶电弱相变具有显著的影响,并能进一步增强电弱相变强度.因此,作者预言了电弱相变诱发的引力波可能会在未来推出的U-DECIGO等引力波探测器中检验.此外,作者研究了通过右手中微子和标量双重态的相互作用而产生的非零马约拉纳中微子质量,并解释了宇宙中以FIMP形式存在的暗物质的生成.

关 键 词：W boson mass Dark matter NEUTRINO Electroweak phase transition Gravitational waves 

分 类 号：O572[理学—粒子物理与原子核物理]