Next-to-next-to-leading order QCD ? EW corrections to Z-boson pair production at electron-positron colliders

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外文摘要：We present a comprehensive analytic calculation of the next-to-next-to-leading order QCD⊗ EW correc-tions to Z-boson pair production at electron-positron colliders.The two-loop master integrals essential to this calcu-lation are evaluated using the differential equation method.In this paper,we detail the formulation and solution of the canonical differential equations for the two-loop three-point master integrals with two on-shell Z-boson external legs and a massive internal quark in the loops.These canonical master integrals are systematically expanded as a Taylor series in the dimensional regulator,ε=(4-d)/2,up to the order of ε4,with coefficients expressed in terms of Goncharov polylogarithms up to weight four.Upon applying our analytic expressions of these master integrals to the phenomenological analysis of Z-pair production,we observe that the O(ααs)corrections manifest at a level of approximately one percent when compared to the leading-order predictions,underscoring their significance for com-parisons with future high-precision experimental data.

外文关键词：

Z-boson pair productionNNLO QCD ⊗ EW correctionscanonical differential equationsGoncharov polylogarithms

作者：

黎哲、张仁友、李书香、王晓峰、李攀峰、蒋一、韩良、王清海

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作者单位：

State Key Laboratory of Particle Detection and Electronics,University of Science and Technology of China,Hefei 230026,China

Department of Modern Physics,University of Science and Technology of China,Hefei 230026,China

Anhui Center for Fundamental Sciences in Theoretical Physics,University of Science and Technology of China,Hefei 230026,China

Department of Physics,National University of Singapore,Singapore 117551,Singapore

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出版年：

2025

DOI：

10.1088/1674-1137/ad77b4

中国物理C(英文版)

中国物理学会　中国科学院高能物理研究所　中国科学院近代物理研究所

中国物理C(英文版)

影响因子：0.347

ISSN：1674-1137

年,卷(期)：2025.49(1)