论文标题
该过程的横截面$ e^+e^ - \ toλ\barλ$在Charmonium $ψ（3770）$附近的$barλ$，包括三胶和$ d $ -Meson Loop贡献
The cross section of the process $e^+e^- \to Λ\barΛ$ in the vicinity of charmonium $ψ(3770)$ including three-gluon and $D$-meson loop contributions
论文作者
论文摘要
该过程的总横截面$ e^+e^ - \至λ\barλ$是在接近$ψ（3770）$ charmone状态的能量范围内计算的。考虑了两种不同的贡献：$ d $ -Meson Loop和三个Gluon Charmon an灭。他们俩都明显地贡献了数据，并相当重现了数据。这些贡献的大相对相对于纯电磁机理产生。作为产品，对于大型动量转移的区域，获得了电磁形式$λ$ -Hyperon的拟合。
The total cross section of the process $e^+e^- \to Λ\barΛ$ is calculated within the energy range close to the mass of $ψ(3770)$ charmonium state. Two different contributions were considered: the $D$-meson loop and the three gluon charmonium annihilation one. Both of them contribute noticeably and in sum fairly reproduce the data. Large relative phase for these contributions are generated with respect to the pure electromagnetic mechanism. As a by product the fit for the electromagnetic form factor of $Λ$-hyperon is obtained for the large momentum transferred region.
