Hybrid high-energy factorization and evolution at NLO from the high-energy limit of collinear factorization

被引:0
作者
van Hameren, Andreas [1 ]
Nefedov, Maxim [2 ]
机构
[1] Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland
[2] Ben Gurion Univ Negev, Phys Dept, IL-84105 Beer Sheva, Israel
来源
JOURNAL OF HIGH ENERGY PHYSICS | 2025年 / 02期
基金
欧盟地平线“2020”;
关键词
Deep Inelastic Scattering or Small-x Physics; Factorization; Renormalization Group; Higher-Order Perturbative Calculations; HEAVY FLAVOR; QCD COHERENCE; AMPLITUDES; SCATTERING; BEHAVIOR;
D O I
10.1007/JHEP02(2025)160
中图分类号
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号
摘要
We derive the scheme of NLO computations of generic observables in high-energy hadron-hadron collisions within the framework of high-energy factorization (HEF) with one off-shell initial-state parton, by taking a high-energy limit of the NLO computation in collinear factorization (CF). The NLO terms belonging to the projectile and target are identified and the ambiguity of projectile-target separation is related with the Collins-Soper scale (mu Y). The NLO unintegrated PDF(UPDF) is constructed in terms of the usual PDFs, and its mu Y-evolution reproduces the Collins-Soper-Sterman equation in the TMD limit (|k perpendicular to| << mu Y). The resummation of high-energy logarithms is taken care of by the BFKL-Collins-Ellis evolution of the Green's function in the UPDF.
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