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arXiv 2102.13112hep-ph
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弱手征拉格朗日量中轴子的一致处理

Consistent treatment of axions in the weak chiral Lagrangian

Martin Bauer, Matthias Neubert, Sophie Renner, Marvin Schnubel, Andrea Thamm

摘要:

我们提出了一个一致的实施弱衰变涉及一个轴子或类轴子粒子的上下文中的有效手征拉格朗日。我们认为,以前的治疗,这样的过程中使用了不正确的表示的味道变化的夸克流的手征理论。作为一个应用程序,我们推导出模型无关的结果的衰变$K^-\toπ^- a$和$π^-\to e^-\barν_e a$在领先的手征展开和任意的轴子耦合和质量。特别是,我们发现,$K^-\toπ^- a$的分支比几乎是40倍以上,比以前估计。

英文摘要:

We present a consistent implementation of weak decays involving an axion or axion-like particle in the context of an effective chiral Lagrangian. We argue that previous treatments of such processes have used an incorrect representation of the flavor-changing quark currents in the chiral theory. As an application, we derive model-independent results for the decays $K^-\toπ^- a$ and $π^-\to e^-\barν_e a$ at leading order in the chiral expansion and for arbitrary axion couplings and mass. In particular, we find that the $K^-\toπ^- a$ branching ratio is almost 40 times larger than previously estimated.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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