arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0912.4562hep-ph
收藏

矢量介子的轻子味破坏衰变

Lepton flavor violating decays of vector mesons

Thomas Gutsche, Juan C. Helo, Sergey Kovalenko, Valery E. Lyubovitskij

摘要:

本文估计了矢量介子$ρ, ω, ϕ\to e μ$的轻子味破坏衰变率。理论工具是基于一个有效的拉格朗日方法,没有提到任何具体实现的物理超出负责轻子味违反标准模型(\Lfv)。从已有的核$μ^--e^-$转换的实验结果中提取了有效的轻子-矢量介子耦合。特别是,我们推导出的\Lfv分支比的上限${\rm Br}(ϕ\to e μ) \leq1.3 \times 10^{-21}$这是更严格的比最近的实验结果${\rm Br}(ϕ\to e μ) < 2 \times 10^{-6}$提出的SND协作。在这封信中导出的矢量介子的\Lfv衰变的非常小的限制使得这些过程的直接实验观察是不现实的。

英文摘要:

We estimate the rates of lepton flavor violating decays of the vector mesons $ρ, ω, ϕ\to e μ$. The theoretical tools are based on an effective Lagrangian approach without referring to any specific realization of the physics beyond the standard model responsible for lepton flavor violation (\Lfv). The effective lepton-vector meson couplings are extracted from the existing experimental bounds on the nuclear $μ^--e^-$ conversion. In particular, we derive an upper limit for the \Lfv branching ratio ${\rm Br}(ϕ\to e μ) \leq1.3 \times 10^{-21}$ which is much more stringent than the recent experimental result ${\rm Br}(ϕ\to e μ) < 2 \times 10^{-6}$ presented by the SND Collaboration. Very tiny limits on \Lfv decays of vector mesons derived in this letter make direct experimental observation of these processes unrealistic.

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。

↑