AI 中文总结
本研究在SMEFT框架下通过单圈RG分析，发现原本树图阶无贡献的算符可通过混合产生显著无中微子双β衰变贡献，所得约束为七维算符提供了比介子衰变更严格的限，还指出了次领头对数阶外贡献的重要性。
AI 中文摘要
我们在标准模型有效场论（SMEFT）框架下对无中微子双β衰变开展完整的单圈重整化群（RG）分析。尽管若干有效算符在树图阶对该过程无贡献，但我们证明它们可通过算符混合产生显著贡献。通过考虑SMEFT内完整的单圈RG演化，我们发现所得约束为大量七维算符提供了最严格限，优于来自介子衰变的限制。我们还强调了次领头对数阶之外贡献的重要性，其对特定算符和味组合可产生主导效应。
英文摘要
We perform a complete one-loop Renormalization Group (RG) analysis of neutrinoless double-beta decays within the Standard Model Effective Field Theory (SMEFT). Although several effective operators do not contribute to these processes at tree level, we show that they can generate sizable contributions through operator mixing. By accounting for the full one-loop RG evolution within the SMEFT, we find that the resulting constraints provide the most stringent bounds on numerous dimension-seven operators, improving upon limits derived from meson decays. We also highlight the importance of contributions beyond the first leading logarithm, which can provide the leading effects for specific operators and flavor combinations.
Comments10 pages, 4 figures
