Planar two-loop master integrals for massive Bhabha scattering:: Nf=1 and Nf=2

被引：6
作者：
Actis, Stefano [1 ]
Czakon, Michal
Gluza, Janusz
Riemann, Tord
机构：
[1] DESY, Deutsch Elektronen Synchrotron, D-15738 Zeuthen, Germany
[2] Univ Wurzburg, Inst Theoret Phys, D-97074 Wurzburg, Germany
[3] Silesian Univ, Inst Phys, PL-40007 Katowice, Poland
来源：
NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS | 2006年 / 160卷
关键词：
D O I：
10.1016/j.nuclphysbps.2006.09.034
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：
Recent developments in the computation of two-loop master integrals for massive Bhabha scattering are briefly reviewed. We apply a method based on expansions of exact Mellin-Barnes representations and evaluate all planar four-point master integrals in the approximation of small electron mass at fixed scattering angle for the one-flavor case. The same technique is employed to derive and evaluate also all two-loop masters generated by additional fermion flavors. The approximation is sufficient for the determination of QED two-loop corrections for Bhabha scattering in the kinematics planned to be used for the luminosity determination at the ILC.
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页码：91 / 100
页数：10
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