Analytic NNLO QCD corrections to top quark pair production in electron-positron collisions

被引：1
作者：
Chen, Long-Bin [3 ]
Wang, Jian [4 ,5 ]
Wang, Yefan [1 ,2 ]
机构：
[1] Nanjing Normal Univ, Dept Phys, Nanjing 210023, Jiangsu, Peoples R China
[2] Nanjing Normal Univ, Inst Theoret Phys, Nanjing 210023, Jiangsu, Peoples R China
[3] Guangzhou Univ, Sch Phys & Mat Sci, Guangzhou 510006, Peoples R China
[4] Shandong Univ, Sch Phys, Jinan 250100, Shandong, Peoples R China
[5] Peking Univ, Ctr High Energy Phys, Beijing 100871, Peoples R China
来源：
JOURNAL OF HIGH ENERGY PHYSICS | 2024年 / 09期
基金：
美国国家科学基金会;
关键词：
Scattering Amplitudes; The Strong Coupling; Top Quark; FEYNMAN DIAGRAMS; NEAR-THRESHOLD; HEAVY QUARKS; O(ALPHA(2)(S)); ANNIHILATION; RUNDEC;
D O I：
10.1007/JHEP09(2024)014
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 present the analytic total cross section of top quark pair production in electron-positron annihilation at next-to-next-to-leading order (NNLO) in Quantum Chromodynamics (QCD). By utilizing the optical theorem, the NNLO corrections are related to the imaginary parts of three-loop self-energy Feynman diagrams, of which the master integrals are calculated with canonical differential equations. The analytic results for the NNLO corrections are expressed in terms of multiple polylogarithms as well as elliptic functions. We discuss the asymptotic expansions near the threshold and in the high energy limit in detail. Numerical results are provided for the total cross section of top quark pair production at future lepton colliders.
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页数：29
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