A planar four-loop form factor and cusp anomalous dimension in QCD

被引：57

作者：

Henn, Johannes M. ^{[1
]}

Smirnov, Alexander V. ^{[2
]}

Smirnov, Vladimir A. ^{[3
]}

Steinhauser, Matthias ^{[4
]}

机构：

[1] Johannes Gutenberg Univ Mainz, PRISMA Cluster Excellence, D-55099 Mainz, Germany

[2] Moscow MV Lomonosov State Univ, Ctr Res Comp, Moscow 119991, Russia

[3] Moscow MV Lomonosov State Univ, Skobeltsyn Inst Nucl Phys, Moscow 119991, Russia

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

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2016年 / 05期

关键词：

Perturbative QCD; Scattering Amplitudes; DIFFERENTIAL-EQUATIONS; MASSLESS PROPAGATORS; ASYMPTOTIC-EXPANSION; SPLITTING FUNCTIONS; MASTER INTEGRALS; IMPLEMENTATION; ALGORITHM; BEHAVIOR; PARTS;

D O I：

10.1007/JHEP05(2016)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 compute the fermionic contribution to the photon-quark form factor to four-loop order in QCD in the planar limit in analytic form. From the divergent part of the latter the cusp and collinear anomalous dimensions are extracted. Results are also presented for the finite contribution. We briefly describe our method to compute all planar master integrals at four-loop order.

引用

页数：17

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