Two-loop fermionic corrections to massive Bhabha scattering

被引：29

作者：

Actis, Stefano ^{[1
]}

Czakon, Michal

Gluza, Janusz

Riemann, Tord

机构：

[1] DESY, Deutsch Elektronen Synchrotron, Platanenallee 6, D-15738 Zeuthen, Germany

[2] Univ Wurzburg, Inst Theoret Phys & Astrophys, D-97074 Wurzburg, Germany

[3] NCSR Demokritos, Inst Nucl Phys, GR-15310 Athens, Greece

[4] Silesian Univ, Inst Phys, PL-40007 Katowice, Poland

来源：

NUCLEAR PHYSICS B | 2007年 / 786卷 / 1-2期

关键词：

D O I：

10.1016/j.nuclphysb.2007.06.023

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 evaluate the two-loop corrections to Bhabha scattering from fermion loops in the context of pure quantum electrodynamics. The differential cross section is expressed by a small number of master integrals with exact dependence on the fermion masses m(e), m (f) and the Mandelstam invariants s, t. u. We determine the limit of fixed scattering angle and high energy, assuming the hierarchy of scales m(e)(2) << m(f)(2) << s, t, u. The numerical result is combined with the available non-fermionic contributions. As a by-product, we provide an independent check of the known electron-loop contributions. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：26 / 51

页数：26

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