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arXiv 2202.09385hep-phhep-exhep-lat
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$Δ$ F = 2跃迁的SMEFT解释

SMEFT interpretation of $Δ$F = 2 transitions

Jason Aebischer

摘要:

本文讨论了在弱有效场理论(WET)的电弱标度(EW)下和在标准模型有效场论(SMEFT)的EW标度以上的背景下,$ΔF= 2$跃迁的模型无关的解剖。给出了两个用Wilson系数表示的混频振幅$M_{12}$的BSM贡献的主公式。进入这些公式的系数分别包含EW标度和NP标度$Λ$以下的所有信息。顶夸克汤川耦合的重整化群演化对结果的影响最大。所得到的表达式取决于是否考虑下基或上基的SMEFT算子。

英文摘要:

A model-independent anatomy of $ΔF= 2$ transitions in the context of the Weak Effective Theory (WET) below the electroweak scale (EW) and the Standard Model Effective Field Theory (SMEFT) above the EW scale is discussed. Two master formulae for the BSM contribution of the mixing amplitude $M_{12}$, in terms of Wilson coefficients are presented. The coefficients entering these formulae contain all the information below the EW scale and the NP scale $Λ$, respectively. The renormalization group evolution from the top-quark Yukawa coupling has the largest impact on the result. The obtained expressions depend on whether the down-basis or the up-basis for SMEFT operators is considered.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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