Two-loop QCD corrections to the heavy quark form factors: Axial vector contributions

被引：68

作者：

Bernreuther, W ^{[1
]}

Bonciani, R

Gehrmann, T

Heinesch, R

Leineweber, T

Mastrolia, P

Remiddi, E

机构：

[1] Rhein Westfal TH Aachen, Inst Theoret Phys, D-52056 Aachen, Germany

[2] Univ Freiburg, Fak Math & Phys, D-79104 Freiburg, Germany

[3] Univ Zurich, Inst Theoret Phys, CH-8057 Zurich, Switzerland

[4] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA

[5] Univ Bologna, Dipartimento Fis, I-40126 Bologna, Italy

[6] INFN, Sez Bologna, I-40126 Bologna, Italy

来源：

NUCLEAR PHYSICS B | 2005年 / 712卷 / 1-2期

关键词：

Feynman diagrams; multi-loop calculations; vertex diagrams; heavy quarks;

D O I：

10.1016/j.nuclphysb.2005.01.035

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 consider the Z* Q Q vertex to order alpha(2)(S) in the QCD coupling for an on-shell massive quark-antiquark pair and for arbitrary momentum transfer of the Z boson. We present closed analytic expressions for the two parity-violating form factors of that vertex at the two-loop level in QCD, excluding the contributions from triangle diagrams. These form factors are expressed in terms of 1-dimensional harmonic polylogarithms of maximum weight 4. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：229 / 286

页数：58

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