Two-loop master integrals for heavy-to-light form factors of two different massive fermions

被引：9
|
作者：
Chen, Long-Bin [1 ]
机构：
[1] Guangzhou Univ, Sch Phys & Elect Engn, 230 GuangZhou Univ City Outer Ring Rd, Guangzhou 510006, Guangdong, Peoples R China
来源：
JOURNAL OF HIGH ENERGY PHYSICS | 2018年 / 02期
基金：
中国国家自然科学基金;
关键词：
Perturbative QCD; Precision QED; NUMERICAL EVALUATION; QCD CORRECTIONS; QUARK DECAYS; EQUATIONS; IMPLEMENTATION; DIAGRAMS;
D O I：
10.1007/JHEP02(2018)066
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 calculate the full set of the two-loop master integrals for heavy-to-light form factors of two different massive fermions for arbitrary momentum transfer in NNLO QCD or QED corrections. These integrals allow to determine the two-loop QCD or QED corrections to the amplitudes for heavy-to-light form factors of two massive fermions in a full analytical way, without any approximations. The analytical results of the master integrals are derived using the method of differential equations, along with a proper choosing of canonical basis for the master integrals. All the results of master integrals are expressed in terms of Goncharov polylogarithms.
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页数：20
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