发表机构
Hebei University; Universidade de Lisboa（河北大学; 里斯本大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究在$U(1)_X$SSM框架下计算了$b\rightarrow c\ell \nu$过程的轻子味普适性，通过参数分析发现该模型能提供优于标准模型的数值结果，有助于相关研究。
AI 中文摘要
本文计算了在最小超对称标准模型的U(1)扩展（$U(1)_X$SSM）下包含$b\rightarrow c\ell \nu$过程的轻子味普适性，并提供了数值分析和总结。数值结果用于绘制一维和多维图，以分析各种参数对比率$(\frac{R_{J/\psi}}{R^{SM}_{J/\psi}}$, $\frac{R_{{D}_s}}{R^{SM}_{D_s}}, \frac{R_{{D^*}_s}}{R^{SM}_{D^*_s}},\frac{R_{{\Lambda}_c}}{R^{SM}_{\Lambda_c}})$的影响。结果表明，几个参数对这些比率有一定影响。虽然它不能很好地匹配实验数据，但通过正确的参数值组合，它可以给出比标准模型更好的数值结果。这表明$U(1)_X$SSM对于研究$b\rightarrow c\ell \nu$过程非常有帮助。
英文摘要
This paper calculates the lepton flavor universality including the $b\rightarrow c\ell ν$ process under the U(1) extension of the minimal supersymmetric standard model ($U(1)_X$SSM), and provides numerical analysis and summary. The numerical results are used to create one-dimensional and multi-dimensional plots to analyze the impacts of various parameters on the ratios $(\frac{R_{J/ψ}}{R^{SM}_{J/ψ}}$, $\frac{R_{{D}_s}}{R^{SM}_{D_s}}, \frac{R_{{D^*}_s}}{R^{SM}_{D^*_s}},\frac{R_{Λ_c}}{R^{SM}_{Λ_c}})$. The results show that several parameters have a certain effect on the ratios. Although it can't match the experimental data very well, with the right combination of parameter values, it can give better numerical results than the Standard Model. This shows that the $U(1)_X$SSM is very helpful for studying $b\rightarrow c\ell ν$ processes.
