发表机构
TRIUMF; School of Physics, Korea Institute for Advanced Study（特留姆夫实验室; 韩国高等科学研究院物理学院）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本工作从紫外视角研究标量与规范玻色子耦合算符的产生，发现四维弱耦合可重整化模型中规范耦合对标量为对数依赖，还探讨了其早期宇宙等场景的唯象学含义。
AI 中文摘要
实验中已对标准模型的规范耦合变化进行了搜寻，且这类变化被提出作为解决基础物理学中未决问题的方案。变化的规范耦合可源于与规范动能项耦合的动力学标量场，该机制被广泛应用，且假设标量与规范玻色子为最小线性耦合。本工作从紫外视角研究该算符的产生，论证在四维时空的弱耦合可重整化完备模型中，规范不变性要求有效规范耦合对标量的主导依赖为对数而非线性，这类场景中的规范耦合演化可完全由含动力学质量阈值的重整化群跑动描述。在次主导阶或四维以上时空，我们给出示例表明更一般的行为是可能的。最后，我们讨论动力学演化的规范耦合的唯象学含义，尤其在早期宇宙场景中。
英文摘要
Variations in the gauge couplings of the Standard Model have been searched for experimentally and proposed as solutions to open questions in fundamental physics. Varying gauge couplings can arise from a dynamical scalar field coupled to the gauge kinetic term. This mechanism has been invoked extensively, assuming a minimal linear coupling of the scalar to the gauge bosons. In this work, we investigate how this operator is generated from the ultraviolet perspective. We argue that in weakly coupled, renormalizable completions in four spacetime dimensions, gauge invariance forces the leading dependence of the effective gauge coupling on the scalar to be logarithmic rather than linear. The gauge coupling evolution in these scenarios can be entirely described by the renormalization-group running with dynamical mass thresholds. Beyond leading order or four dimensions, we provide examples showing that more general behavior is possible. Finally, we discuss the phenomenological implications of dynamically evolving gauge couplings, particularly in early-universe settings.
Comments42 pages, 4 figures. v2: references added
