论文标题
$ cp $违反中性kaon系统的测量以$ j/ψ$衰减在超级tau-charm设施
Measurement of $CP$ violation of neutral kaon system in $J/ψ$ decay at the Super Tau-Charm Facility
论文作者
论文摘要
在本文中，我们介绍了$ k^{0} - \ bar {k}^{0} $ system在$ j/ψ$ decay中的$ k^{0} - \ bar {0} - \ bar {0} - \ bar {0} - \ bar。 $ cp $违规参数$η_{+ - } $和$η_{00} $以及它们相应的阶段$ ϕ _ {+ - } $和$ ϕ_ {00} $可以通过$ k^{0} $之间的时间相关衰减率的差来确定$ j/ψ\ rightarrow k^{ - }π^{ +} k^{0} + c.c. $ processes。 We investigate the precisions of the measurements of the CP violation effect at the Super Tau-Charm facility(STCF), a $e^{+}e^{-}$ collider with a peak luminosity of $0.5\times10^{35}\ \rm{cm}^{-2}\rm{s}^{-1}$.参数$η_ {+ - } $及其相$ ϕ _ {+ - } $的相对精度为$ 1 \ times 10^{ - 3} $，统计准确性将比现有PDG平均值的数量好几倍。
In this paper, we present a preliminary study of $CP$ violation effect of $K^{0}-\bar{K}^{0}$ system in $J/ψ$ decay. The $CP$ violation parameters $η_{+-}$ and $η_{00}$ as well as their corresponding phase $ϕ_{+-}$ and $ϕ_{00}$ can be determined by the difference of the time-dependent decay rates between $K^{0}$ and $\bar{K}^{0}$ produced from $J/ψ\rightarrow K^{-}π^{+}K^{0} + c.c.$ processes. We investigate the precisions of the measurements of the CP violation effect at the Super Tau-Charm facility(STCF), a $e^{+}e^{-}$ collider with a peak luminosity of $0.5\times10^{35}\ \rm{cm}^{-2}\rm{s}^{-1}$. The parameters $η_{+-}$ and its phase $ϕ_{+-}$ can be measured at a relative precision of $1 \times 10^{-3}$, which the statistical accuracy will be several times better than that of the existing PDG average values.
