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arXiv 2203.09561hep-phhep-ex
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为SMEFT增添味结构

Adding Flavor to the SMEFT

Admir Greljo, Ajdin Palavrić, Anders Eller Thomsen

AI总结:

本文系统研究SMEFT中维度-6算符的味结构,定义多种味对称性破缺模式,构造并计数前几阶算符,并提供Mathematica程序包SMEFTflavor以支持唯象研究与全局拟合。

摘要:

我们研究标准模型有效场论(SMEFT)中守恒轻子数和重子数的维度-6算符的味结构。在文献[1]工作的基础上,我们定义了几种有充分动机的味对称性及其破缺模式,它们作为关于TeV尺度上方不远处的紫外(UV)动力学的竞争性假设。特别地,我们考虑了夸克部分的四种不同结构以及带电轻子部分的七种不同结构。味破缺的spurion集合(几乎)总是取为重现观测到的带电费米子质量和混合所需的最小集合。对于每种情形,我们显式构造并计数了spurion展开前几阶的算符,为唯象学研究和全局拟合提供了即用型设置。我们提供了一个Mathematica程序包SMEFTflavor,以便对本工作未涵盖的味对称性进行类似分析。

英文摘要:

We study the flavor structure of the lepton and baryon number--conserving dimension-6 operators in the Standard Model effective field theory (SMEFT). Building on the work of [1], we define several well-motivated flavor symmetries and symmetry-breaking patterns that serve as competing hypotheses about the ultraviolet (UV) dynamics beyond the SM, not far above the TeV scale. In particular, we consider four different structures in the quark sector and seven in the charged lepton sector. The set of flavor-breaking spurions is (almost) always taken to be the minimal one needed to reproduce the observed charged fermion masses and mixings. For each case, we explicitly construct and count the operators to the first few orders in the spurion expansion, providing ready-for-use setups for phenomenological studies and global fits. We provide a Mathematica package SMEFTflavor to facilitate similar analyses for flavor symmetries not covered in this work.

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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