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arXiv 2203.11976hep-ph
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SMEFT到$\mathcal O(1/Λ^4)$及更高阶段的单轻子生产

Monolepton production in SMEFT to $\mathcal O(1/Λ^4)$ and beyond

Taegyun Kim, Adam Martin

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摘要：

我们在标准模型有效场论（SMEFT）框架内计算了$pp \to \ell^{+}ν, \ell^-\bar ν$到${\cal{O}}(1/Λ^4)$。特别是，我们计算了四维费米子的贡献，从六维和八维运营商，其中占主导地位的大质心能量。我们探讨的相对大小的$\mathcal O(1/Λ^4)$和$\mathcal O(1/Λ^2)$结果为各种运动学制度和假设的威尔逊系数。还提供了在${\cal{O}}(1/Λ^4)$的Drell-Yan生产$pp \to \ell^+\ell^-$的结果。此外，我们发展的形式为四个费米子接触项的贡献$pp \to \ell^{+}ν, \ell^-\bar ν, pp \to \ell^+\ell^-$的任意质量尺寸。这使我们能够估计的影响，甚至更高的维度（维度$> 8$）的SMEFT框架中的条款。

英文摘要：

We calculate $pp \to \ell^{+}ν, \ell^-\bar ν$ to ${\cal{O}}(1/Λ^4)$ within the Standard Model Effective Field Theory (SMEFT) framework. In particular, we calculate the four-fermion contribution from dimension six and eight operators, which dominates at large center of mass energy. We explore the relative size of the $\mathcal O(1/Λ^4)$ and $\mathcal O(1/Λ^2)$ results for various kinematic regimes and assumptions about the Wilson coefficients. Results for Drell-Yan production $pp \to \ell^+\ell^-$ at ${\cal{O}}(1/Λ^4)$ are also provided. Additionally, we develop the form for four fermion contact term contributions to $pp \to \ell^{+}ν, \ell^-\bar ν, pp \to \ell^+\ell^-$ of arbitrary mass dimension. This allows us to estimate the effects from even higher dimensional (dimension $> 8$) terms in the SMEFT framework.

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