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High Energy Physics - Phenomenology

arXiv:2501.01060 (hep-ph)
[Submitted on 2 Jan 2025 ]

Title: $S$, $T$, $U$ Parameters in The B-LSSM

Title: $S$,$T$,$U$B-LSSM中的参数

Authors:Sheng-Kai Cui, Ke-Sheng Sun, Yu-Li Yan, Jin-Lei Yang, Tai-Fu Feng
Abstract: Using the pinch technique, we compute the one-loop vertices of weak interactions in the B-LSSM and incorporate their pinch contributions into the gauge boson self-energies. Compared to the definitions of the $S$, $T$, and $U$ parameters in the Standard Model based on the $SU(2)_L\otimes U(1)_Y$ group, the corresponding parameters in the B-LSSM are modified. We provide these redefined $S$, $T$, and $U$ parameters and demonstrate the convergence of the results. In the framework of the low-energy effective Lagrangian for weak interactions, the $S$, $T$, and $U$ parameters can be expressed as functions of certain parameters in the B-LSSM. The updated experimental and fitting results constrain the parameter space of the B-LSSM strongly.
Abstract: 利用捏合技术,我们计算了B-LSSM中弱相互作用的一环顶点,并将其捏合贡献纳入规范玻色子的自能中。 与基于$SU(2)_L\otimes U(1)_Y$群的SM中$S$、$T$和$U$参数的定义相比,B-LSSM中的相应参数被修改。 我们给出了这些重新定义的$S$、$T$和$U$参数,并展示了结果的收敛性。 在弱相互作用的低能有效拉格朗日框架下,参数$S$、$T$和$U$可以表示为 B-LSSM 中某些参数的函数。 最新的实验和拟合结果强烈限制了 B-LSSM 的参数空间。
Subjects: High Energy Physics - Phenomenology (hep-ph)
Cite as: arXiv:2501.01060 [hep-ph]
  (or arXiv:2501.01060v1 [hep-ph] for this version)
  https://doi.org/10.48550/arXiv.2501.01060
arXiv-issued DOI via DataCite

Submission history

From: Sheng-Kai Cui [view email]
[v1] Thu, 2 Jan 2025 05:09:38 UTC (333 KB)
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