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arXiv 1408.0086hep-ph
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$τ^\pm\rightarrow K^\pm ρ^0 (ω)ν_τ\rightarrow K^\pm π^+π^-ν_τ$中的直接CP破坏

Direct CP violation in $τ^\pm\rightarrow K^\pm ρ^0 (ω)ν_τ\rightarrow K^\pm π^+π^-ν_τ$

Chao Wang, Xin-Heng Guo, Ying Liu, Rui-Cheng Li

摘要:

研究了标准模型中$τ^\pm\rightarrow K^\pm ρ^0 (ω)ν_τ\rightarrow K^\pm π^+π^-ν_τ$衰变过程中的直接CP破坏.一个有趣的机制,涉及电荷对称性违反混合之间的$ρ^0$和$ω$被施加到扩大CP不对称性。在这种机制下,最大微分CP不对称性和局域积分CP不对称性分别可以达到$-(5.6^{+2.9}_{-1.7})\times10^{-12}$和$6.3^{+2.4}_{-3.3}\times 10^{-11}$,这为发现CP破坏的新物理留下了很大的空间.

英文摘要:

We study the direct CP violation in the $τ^\pm\rightarrow K^\pm ρ^0 (ω)ν_τ\rightarrow K^\pm π^+π^-ν_τ$ decay process in the Standard Model. An interesting mechanism involving the charge symmetry violating mixing between $ρ^0$ and $ω$ is applied to enlarge the CP asymmetry. With this mechanism, the maximum differential and localized integrated CP asymmetries can reach $-(5.6^{+2.9}_{-1.7})\times10^{-12}$ and $6.3^{+2.4}_{-3.3}\times 10^{-11}$, respectively, which still leave plenty room for CP-violating New Physics to be discovered through this process.

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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