Adding Flavor to the SMEFT

Journal of High Energy Physics

Regular Article - Theoretical Physics

Anders Eller Thomsen¹  Admir Greljo¹  Ajdin Palavrić¹ 

[1] Albert Einstein Center for Fundamental Physics, Institute for Theoretical Physics, University of Bern, Hochschulstrasse, CH-3012, Bern, Switzerland;

关键词: Flavour Symmetries;    SMEFT;    Theories of Flavour;   

DOI  :  10.1007/JHEP10(2022)005

 received in 2022-04-05, accepted in 2022-09-14,  发布年份 2022

来源: Springer

【 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 (https://github.com/aethomsen/SMEFTflavor) to facilitate similar analyses for flavor symmetries not covered in this work.

【 授权许可】

Unknown   
© The Author(s) 2022

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