Constructing a light QCD axion without 1/N tuning

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

Physical Review D Pub Date : 2025-10-15 DOI:10.1103/xdyq-b67n

Abhishek Banerjee, Manuel A. Buen-Abad, Anson Hook

{"title":"Constructing a light QCD axion without 1/N tuning","authors":"Abhishek Banerjee, Manuel A. Buen-Abad, Anson Hook","doi":"10.1103/xdyq-b67n","DOIUrl":null,"url":null,"abstract":"We consider axions lighter than what their QCD couplings might otherwise suggest. Starting with a Z</a:mi>N</a:mi></a:msub></a:math> axion, we introduce a small explicit <d:math xmlns:d=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><d:msub><d:mi mathvariant=\"double-struck\">Z</d:mi><d:mi>N</d:mi></d:msub></d:math> symmetry-breaking coupling between the Standard Model Higgs boson and a reheaton. This small explicit breaking allows us to populate a large portion of the light axion <g:math xmlns:g=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><g:msub><g:mi>m</g:mi><g:mi>a</g:mi></g:msub><g:mo>−</g:mo><g:msub><g:mi>f</g:mi><g:mi>a</g:mi></g:msub></g:math> plane, removes the <i:math xmlns:i=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><i:mn>1</i:mn><i:mo>/</i:mo><i:mi>N</i:mi></i:math> tuning in the <k:math xmlns:k=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><k:msub><k:mi mathvariant=\"double-struck\">Z</k:mi><k:mi>N</k:mi></k:msub></k:math>-axion, and explains why only our sector was reheated. Because of finite temperature effects, axions of this sort undergo either “rigged” misalignment, where the axion misalignment angle is effectively <n:math xmlns:n=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><n:mi>π</n:mi></n:math> regardless of its initial value, or “shuffled” misalignment, where the initial angle is effectively randomized.","PeriodicalId":20167,"journal":{"name":"Physical Review D","volume":"24 1","pages":""},"PeriodicalIF":5.3000,"publicationDate":"2025-10-15","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/xdyq-b67n","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

We consider axions lighter than what their QCD couplings might otherwise suggest. Starting with a ZN axion, we introduce a small explicit ZN symmetry-breaking coupling between the Standard Model Higgs boson and a reheaton. This small explicit breaking allows us to populate a large portion of the light axion ma−fa plane, removes the 1/N tuning in the ZN-axion, and explains why only our sector was reheated. Because of finite temperature effects, axions of this sort undergo either “rigged” misalignment, where the axion misalignment angle is effectively π regardless of its initial value, or “shuffled” misalignment, where the initial angle is effectively randomized.

查看原文本刊更多论文

构建无1/N调谐的轻QCD轴子

我们认为轴子比它们的QCD耦合所暗示的要轻。从ZN轴子开始，我们在标准模型希格斯玻色子和再heaton之间引入了一个小的显式ZN对称破缺耦合。这种小的明显断裂使我们能够填充大部分轻轴子ma - fa平面，消除zn -轴子中的1/N调谐，并解释了为什么只有我们的扇区被重新加热。由于有限的温度效应，这类轴子要么经历“操纵”错位，其中轴子错位角度实际上是π，而不管其初始值，或“洗牌”错位，其中初始角度实际上是随机的。

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.