论文标题
提示$ j/ψ$ photoproduction在CEPC的非相关QCD框架内
Prompt $J/ψ$ photoproduction within the non-relativistic QCD framework at the CEPC
论文作者
论文摘要
研究了未来圆形电子正电子对撞机（CEPC）的非相关QCD（NRQCD）框架内的及时$ j/ψ$光生生产，包括直接光子和分辨光子的贡献。使用不同的长距离矩阵元素集，总横截面由颜色octet通道主导。我们提出了$ j/ψ$生产的不同运动学分布，结果表明，当$ j/ψ$的横向动量高达20 GEV时，大约将有50美元的J/ψ$事件。它使得CEPC的$ J/ψ$光增生是一个测试NRQCD的良好实验室，并进一步阐明了Electron Potitron Collider和Hadron Collider之间NRQCD中NRQCD中的通用问题。
The prompt $J/ψ$ photoproduction within the non-relativistic QCD (NRQCD) framework at the future Circular Electron Positron Collider (CEPC) is studied, including the contributions from both direct and resolved photons. Employing different sets of long distance matrix elements, the total cross section is dominated by the color-octet channel. We present different kinematic distributions of $J/ψ$ production and the results show there will be about 50 $J/ψ$ events when the transverse momentum of $J/ψ$ is up to 20 GeV. It renders that the $J/ψ$ photoprodution at the CEPC is a well laboratory to test the NRQCD and further clarify the universality problem in NRQCD between electron positron collider and hadron collider.
