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arXiv 0911.5166hep-ph
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gg(qq)-> QQ +X截面在O(α_s^4)处的阈值展开

Threshold expansion of the gg(qq) -> QQ+X cross section at O(alpha_s^4)

M. Beneke, M. Czakon, P. Falgari, A. Mitov, C. Schwinn

摘要:

本文导出了次领先强子碰撞中重夸克对产生总截面展开式中的速度增强项的完整集合。我们的表达式考虑了软胶子发射以及势胶子交换的影响。我们证明,有没有增强由于subleading软胶子耦合乘以领先的库仑奇点。

英文摘要:

We derive the complete set of velocity-enhanced terms in the expansion of the total cross section for heavy-quark pair production in hadronic collisions at next-to-next-to-leading order. Our expression takes into account the effects of soft-gluon emission as well as that of potential-gluon exchanges. We prove that there are no enhancements due to subleading soft-gluon couplings multiplying the leading Coulomb singularity.

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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