arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2204.09487hep-ph
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$Z$玻色子混合和$W$玻色子的质量

$Z$ boson mixing and the mass of the $W$ boson

Yu-Pan Zeng, Chengfeng Cai, Yu-Hang Su, Hong-Hao Zhang

摘要:

我们探讨了在树水平上用额外规范玻色子与$Z$玻色子混合来解释$W$玻色子质量的可能性。与$Z$玻色子混合的额外玻色子将改变$Z$玻色子质量的表达,从而改变$W$玻色子质量。我们在这项工作中探索两种模式。我们发现,在导数门暗物质模型中,存在一个参数空间,可以给出观测到的$W$玻色子质量,以及观测到的暗物质遗迹密度。这些参数空间也能满足电弱斜参数和暗物质间接探测的约束。在U(1)延拓模型中,额外玻色子与$B$玻色子的动力学混合也可以给出观测到的$W$玻色子质量。然而,为了满足电弱斜参数拟合,U(1)模型中的动力学混合只能对标准模型$W$玻色子质量贡献大约$27~\mathrm{MeV}$额外质量。这两个模型都表明额外的矢量玻色子在$120~\mathrm{GeV}$周围具有最佳拟合质量。

英文摘要:

We explore the possibility of explaining the $W$ boson mass with an extra gauge boson mixing with the $Z$ boson at tree level. Extra boson mixing with the $Z$ boson will change the expression of the $Z$ boson mass, thus altering the $W$ boson mass. We explore two models in this work. We find that in the Derivative Portal Dark Matter model, there are parameters space which can give the observed $W$ boson mass, as well as the observed Dark Matter relic density. These parameters space can also fulfill the constraints from the electroweak oblique parameters and Dark Matter indirect detection. In the U(1) extension model, the kinetic mixing between extra boson and $B$ boson can also give the observed $W$ boson mass. However, to fulfill electroweak oblique parameters fit the kinetic mixing in the U(1) model can only contribute about $27~\mathrm{MeV}$ extra mass to the Standard Model $W$ boson mass. Both models indicate the extra vector boson with the best fit mass around $120~\mathrm{GeV}$.

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