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arXiv 2408.09440hep-phhep-ex
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次领头阶(NLO)下向前区$η_Q$产生的冲击因子

Forward $η_Q$ production impact factor at NLO

Maxim Nefedov

AI总结:

本研究在$α_s$次领头阶下计算了重夸克偶素${}^1S_0^{[1]}$态向前强产生的高能因子化冲击因子,为将$η_c/η_b$产生截面的QCD修正重整化拓展至超出领头对数近似提供了关键支撑。

摘要:

本文在强耦合常数$α_s$的次领头阶(NLO)下,计算了重夸克-反夸克对($Q\ar{Q}$)的${}^1S_0^{[1]}$态在向前快度区强产生过程的高能因子化(HEF)系数函数,即冲击因子。该冲击因子是共线因子化(CF)框架下,$η_c$或$η_b$介子向前快度区强产生截面高阶QCD修正重整化程序的核心组成部分,这些修正会因部分子质心系能量的对数项而增强。本文给出的NLO计算结果,是将上述重整化方法拓展至超出领头对数近似(LLA)范围的重要一步。

英文摘要:

The High-Energy Factorisation (HEF) coefficient function or impact factor for the hadroproduction of the state ${}^1S_0^{[1]}$ of a heavy quark-antiquark pair ($Q\bar{Q}$) at forward rapidities is computed at NLO in $α_s$. This impact factor is an integral part of the resummation procedure for higher-order QCD corrections to the hadroproduction cross sections of $η_c$ or $η_b$ mesons at forward rapidities in collinear factorisation (CF), enhanced by logarithms of partonic center of mass energy. The NLO computation results of which are presented in this contribution, is an important step towards an extension of aforementioned resummation beyond the Leading Logarithmic Approximation(LLA).

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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