Three-loop nonsinglet matching coefficients for heavy quark currents

被引：7

作者：

Egner, Manuel ^{[1
]}

Fael, Matteo ^{[1
]}

Lange, Fabian ^{[1
,2
]}

Schoenwald, Kay ^{[1
]}

Steinhauser, Matthias ^{[1
]}

机构：

[1] Karlsruhe Inst Technol KIT, Inst Theoret Teilchenphys, D-76128 Karlsruhe, Germany

[2] Karlsruhe Inst Technol KIT, Inst Astroteilchenphys, D-76344 Eggenstein Leopoldshafen, Germany

来源：

PHYSICAL REVIEW D | 2022年 / 105卷 / 11期

关键词：

QCD; ANNIHILATION;

D O I：

10.1103/PhysRevD.105.114007

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We compute the matching coefficients between QCD and nonrelativistic QCD for external vector, axial vector, scalar, and pseudoscalar currents up to three-loop order. We concentrate on the nonsinglet contributions and present precise numerical results with an accuracy of about ten digits. For the vector current the results from Marquard et al. [Phys. Rev. D 89, 034027 (2014)] are confirmed, increasing the accuracy by several orders of magnitude.

引用

页数：8

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