发表机构
Institute of Particle and Nuclear Physics (IPNP), Faculty of Mathematics and Physics, Charles University in Prague; Institute of Physics, Silesian University in Opava; Instituto de Física Corpuscular (IFIC), Universitat de València–CSIC; Department of Physics, University of California, Berkeley（布拉格查理大学数学物理学院粒子与核物理研究所; 奥帕瓦西里西亚大学物理研究所; 巴伦西亚大学-西班牙国家科学研究委员会粒子物理研究所; 加州大学伯克利分校物理学系）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究揭示单圈算子混合使轻子数破坏SMEFT中不同味扇区相互耦合，增强$0νββ$与稀有介子衰变对新物理的敏感性，并影响观测量优先级。
AI 中文摘要
我们研究了单圈算子混合如何重塑轻子数破坏的维度-7 SMEFT相互作用的味敏感性。通过自下而上和自上而下的EFT方法，我们研究了无中微子双β衰变（$0νββ$）与中性流稀有介子衰变$K\ oπνν$和$B\ o K^{(*)}νν$之间的相互作用，这些过程在树级上探测的是看似不相关的夸克和轻子味扇区。我们表明，圈混合在性质上改变了这一图景：味结构通过辐射相互渗透，大幅扩展了对更高新物理能标的敏感性，跨越了算子和味。在自下而上的EFT方法中，这可以使$0νββ$对涉及较重代夸克的算子也高度敏感，而稀有Kaon和$B$衰变则对其他味组合保持关键的互补敏感性。一个使用涉及标量轻夸克的紫外模型的自上而下EFT方法示例，说明了同样的效应如何重新排列不同观测量的相对重要性。
英文摘要
We investigate how one-loop operator mixing reshapes the flavor sensitivity of lepton-number-violating dimension-7 SMEFT interactions. Using both bottom-up and top-down EFT approaches, we study the interplay of neutrinoless double beta decay ($0νββ$) and neutral current rare meson decays $K\toπνν$, and $B\to K^{(*)}νν$, which at tree level probe apparently disconnected quark- and lepton-flavor sectors. We show that loop mixing qualitatively changes this picture: flavor structures radiatively feed into one another, substantially extending the sensitivity to higher new-physics scales across operators and flavors. In the bottom-up EFT approach, this can make $0νββ$ highly sensitive even to operators involving heavier-generation quarks, while rare kaon and $B$ decays retain crucial complementary sensitivity to other flavor combinations. A top-down EFT approach example using a ultraviolet model involving scalar-leptoquark illustrates how the same effects can reorder the relative importance of different observables.
Comments32 Pages plus references, 10 Figures, 4 Tables
