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arXiv · 2205.09585

Hybrid kT-factorization and impact factors at NLO

Andreas van Hameren·Leszek Motyka·Grzegorz Ziarko
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Abstract

In the hybrid kT-factorization formula, one initial-state parton momentum is space-like and carries non-vanishing transverse components, while the other is on-shell. We promote this factorization formula to next-to-leading order. Studying the partonic cross section, we identify all soft and collinear divergencies in the real and virtual contribution, and recognize that all non-cancelling ones can be attributed to PDF evolution, evolution kernel, and target impact factors. In result, we construct a framework that may be used to compute NLO impact factors in general. In particular, we recover known expressions for inclusive NLO quark-and gluon impact factor corrections.

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Andreas van Hameren, Leszek Motyka, Grzegorz Ziarko. 2022-05-19. Hybrid kT-factorization and impact factors at NLO. https://doi.org/10.1007/jhep11(2022)103

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