论文标题
$ \ ell_i \ to \ell_jγγ$从$ \ ell_i \到\ell_jγ$的间接上限
Indirect upper limits on $\ell_i\to\ell_jγγ$ from $\ell_i\to\ell_jγ$
论文作者
论文摘要
我们执行有效的现场理论分析，以将带电的Lepton风味违反过程$ \ ell_i \与\ell_jγγ$和$ \ ell_i \与\ell_jγ$相关联。使用$ \ ell_i \ to \ell_jγ$的速率上的当前上限，我们在$ \ ell_i \ to \ell_jγγ$的速率上得出了模型无关的上限。我们的间接限制比当前搜索$μ\ toeγγ$的直接界限要高三个数量级，而四个数量级比电流范围优于$τ\ to \ellγγ$的电流边界。我们还强调了Belle II或Super Tau魅力设施的相关性，以发现罕见的衰减$τ\ to \ellγγ$。
We perform an effective field theory analysis to correlate the charged lepton flavor violating processes $\ell_i\to\ell_jγγ$ and $\ell_i\to\ell_jγ$. Using the current upper bounds on the rate for $\ell_i\to\ell_jγ$, we derive model-independent upper limits on the rates for $\ell_i\to\ell_jγγ$. Our indirect limits are about three orders of magnitude stronger than the direct bounds from current searches for $μ\to eγγ$, and four orders of magnitude better than current bounds for $τ\to\ellγγ$. We also stress the relevance of Belle II or a Super Tau Charm Facility to discover the rare decay $τ\to\ellγγ$.
