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北美退伍军人节(Veterans Day),12 日无更新
arXiv 2005.08816hep-ph
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在CEPC非相对论QCD框架内的快速光生$J/ψ$

Prompt $J/ψ$ photoproduction within the non-relativistic QCD framework at the CEPC

Xi-Jie Zhan, Jian-Xiong Wang

摘要:

在非相对论QCD(NRQCD)框架下研究了未来的环形正负电子对撞机(CEPC)上的瞬发$J/ψ$光生,包括直接光子和分辨光子的贡献。采用不同的长距离矩阵元素集,总截面由色八位组通道主导。我们给出了不同的$J/ψ$产生的运动学分布,结果表明当$J/ψ$的横动量达到20 GeV时,将产生大约50个$J/ψ$事例。结果表明,在CEPC上的$J/ψ$光生是检验NRQCD的一个很好的实验室,可以进一步澄清正负电子对撞机和强子对撞机在NRQCD中的普适性问题。

英文摘要:

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.

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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