Leptonic flavor from a modular A4 symmetry: UV mediators and SMEFT realizations

IF 5.3 2区物理与天体物理 Q1 Physics and Astronomy

Physical Review D Pub Date : 2025-10-01 DOI:10.1103/hdgd-cq45

Adrián Moreno-Sánchez, Ajdin Palavrić

{"title":"Leptonic flavor from a modular A4 symmetry: UV mediators and SMEFT realizations","authors":"Adrián Moreno-Sánchez, Ajdin Palavrić","doi":"10.1103/hdgd-cq45","DOIUrl":null,"url":null,"abstract":"The absence of direct evidence for new physics at current collider energies motivates the study of indirect effects within the framework of the Standard Model effective field theory (SMEFT). In this work, we investigate the role of the A</a:mi>4</a:mn></a:msub></a:math> discrete flavor symmetry in constraining the UV dynamics, giving rise to dimension-six SMEFT operators involving leptons. We consider renormalizable interactions between SM fields and heavy mediators, classified according to their <c:math xmlns:c=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><c:msub><c:mi>A</c:mi><c:mn>4</c:mn></c:msub></c:math> transformation properties in the modular framework, where Yukawa structures are encoded in modular forms. Restricting our analysis to UV interactions with at most a single modular form insertion, we study the resulting classification of <e:math xmlns:e=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><e:msub><e:mi>A</e:mi><e:mn>4</e:mn></e:msub></e:math> UV mediator irreducible representations and explore their implications across a range of observables, including both lepton-flavor-conserving and lepton-flavor-violating processes. A detailed phenomenological analysis is carried out, incorporating both tree-level and one-loop matching contributions for scalar and fermionic mediators, as well as leading-log renormalization group equation effects in case of vectors.","PeriodicalId":20167,"journal":{"name":"Physical Review D","volume":"114 1","pages":""},"PeriodicalIF":5.3000,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Physical Review D","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.1103/hdgd-cq45","RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"Physics and Astronomy","Score":null,"Total":0}

引用次数: 0

Abstract

The absence of direct evidence for new physics at current collider energies motivates the study of indirect effects within the framework of the Standard Model effective field theory (SMEFT). In this work, we investigate the role of the A4 discrete flavor symmetry in constraining the UV dynamics, giving rise to dimension-six SMEFT operators involving leptons. We consider renormalizable interactions between SM fields and heavy mediators, classified according to their A4 transformation properties in the modular framework, where Yukawa structures are encoded in modular forms. Restricting our analysis to UV interactions with at most a single modular form insertion, we study the resulting classification of A4 UV mediator irreducible representations and explore their implications across a range of observables, including both lepton-flavor-conserving and lepton-flavor-violating processes. A detailed phenomenological analysis is carried out, incorporating both tree-level and one-loop matching contributions for scalar and fermionic mediators, as well as leading-log renormalization group equation effects in case of vectors.

查看原文本刊更多论文

模A4对称的轻子味：UV介质和SMEFT实现

在当前的对撞机能量下，缺乏新物理的直接证据激发了在标准模型有效场论（SMEFT）框架内对间接效应的研究。在这项工作中，我们研究了A4离散风味对称在限制UV动力学中的作用，从而产生涉及轻子的六维SMEFT算子。我们考虑SM域和重介质之间的可重整交互，根据它们在模块化框架中的A4变换属性进行分类，其中Yukawa结构以模块化形式编码。将我们的分析限制在最多一个模块形式插入的紫外线相互作用上，我们研究了A4紫外线介质不可约表征的结果分类，并探讨了它们在一系列可观察的过程中的含义，包括保持轻子风味和破坏轻子风味的过程。进行了详细的现象学分析，结合了标量和费米子介质的树级和单回路匹配贡献，以及矢量情况下的超前对数重整化群方程效应。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Physical Review D 物理-天文与天体物理

CiteScore

9.20

自引率

36.00%

发文量

审稿时长

2 months

期刊介绍： Physical Review D (PRD) is a leading journal in elementary particle physics, field theory, gravitation, and cosmology and is one of the top-cited journals in high-energy physics. PRD covers experimental and theoretical results in all aspects of particle physics, field theory, gravitation and cosmology, including: Particle physics experiments, Electroweak interactions, Strong interactions, Lattice field theories, lattice QCD, Beyond the standard model physics, Phenomenological aspects of field theory, general methods, Gravity, cosmology, cosmic rays, Astrophysics and astroparticle physics, General relativity, Formal aspects of field theory, field theory in curved space, String theory, quantum gravity, gauge/gravity duality.