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arXiv 1608.04201hep-ph
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部分子Regge化方法中的NLO计算

Towards NLO calculations in the parton Reggeization approach

Maxim Nefedov, Vladimir Saleev

摘要:

Parton Regge化方法是基于Lipatov的高能过程规范不变量有效场论(EFT)的多尺度硬过程kT因子化方法。新类型的快度发散,与log 1/x-修正,出现在这个形式主义的环路修正。描述了保持有效作用量规范不变性的快度发散正则化的协变过程。作为一个应用实例,计算了Reggeized夸克传播子的单圈修正和γ Qq-散射顶点。所得结果用于构造单圈gamma+gamma -> q + barq振幅的Regge极限。证明了EFT预言与QCD结果的一致性和快度发散的消除。讨论了EFT中的快度重整化群。

英文摘要:

Parton Reggeization approach is the scheme of kT-factorization for multiscale hard processes, which is based on the Lipatov's gauge invariant effective field theory (EFT) for high energy processes in QCD. The new type of rapidity divergences, associated with the log 1/x-corrections, appears in the loop corrections in this formalism. The covariant procedure of regularization of rapidity divergences, preserving the gauge invariance of effective action is described. As an example application, the one-loop correction to the propagator of Reggeized quark and gamma Q q -scattering vertex are computed. Obtained results are used to construct the Regge limit of one-loop gamma+gamma -> q + barq amplitude. The cancelation of rapidity divergences and consistency of the EFT prediction with the full QCD result is demonstrated. The rapidity renormalization group within the EFT is discussed.

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