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arXiv 1607.07352hep-ph
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2HDM中规范无关的$\overline{MS}$重整化

Gauge-independent $\overline{MS}$ renormalization in the 2HDM

Ansgar Denner, Laura Jenniches, Jean-Nicolas Lang, Christian Sturm

摘要:

基于混合角的$\overline{MS}$重整化和Higgs扇区中的软$Z_2$破缺标度$M_{sb}$,给出了CP守恒的Two-Higgs-Doublet模型的一个相容重整化方案.该方案要求在计算的所有步骤中完全一致地处理蝌蚪,以便提供规范无关的$S$矩阵元素。我们展示了如何定义裸物理参数,并通过通用$R_ξ$规范中的显式计算来验证物理量的规范独立性。该程序是简单的,适用于其他模型与扩展希格斯部门。与所提出的方案相比,混合角的$\overline{MS}$重整化与流行的壳层重整化方案相结合,产生了规范依赖的结果已经在单圈水平。我们提出了明确的结果,电弱非线性校正选定的过程中适当的重正化双希格斯模型,特别是讨论其规模的依赖性。

英文摘要:

We present a consistent renormalization scheme for the CP-conserving Two-Higgs-Doublet Model based on $\overline{MS}$ renormalization of the mixing angles and the soft-$Z_2$-symmetry-breaking scale $M_{sb}$ in the Higgs sector. This scheme requires to treat tadpoles fully consistently in all steps of the calculation in order to provide gauge-independent $S$-matrix elements. We show how bare physical parameters have to be defined and verify the gauge independence of physical quantities by explicit calculations in a general $R_ξ$-gauge. The procedure is straightforward and applicable to other models with extended Higgs sectors. In contrast to the proposed scheme, the $\overline{MS}$ renormalization of the mixing angles combined with popular on-shell renormalization schemes gives rise to gauge-dependent results already at the one-loop level. We present explicit results for electroweak NLO corrections to selected processes in the appropriately renormalized Two-Higgs-Doublet Model and in particular discuss their scale dependence.

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