Two-loop formfactors in theories with mass gap and Z-boson production

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• 作者：A. Kotikov ; J.H. Kü ; hn ; O. Veretin
• 关键词：Lattice QCD ; Baryon resonances ; Chiral Lagrangians ; Field theory in a finite volume
• 刊名：Nuclear Physics B
• 出版年：2008
• 期刊代码：45_05503213
• 类别：ph
• 出版时间：7 January 2008
• 卷：788
• 期：1-2
• 页码：47-62
• 文件大小：200 K

摘要

The non-factorizable two-loop corrections to the formfactor both for a U(1)×U(1) and a SU(2)×U(1) gauge theory with massive and massless gauge bosons respectively are evaluated at arbitrary momentum transfer q². The asymptotic behaviour for q²→∞ is compared to a recent calculation of Sudakov logarithms. The result is an important ingredient for the calculation of radiative corrections to Z-boson production at hadron and lepton colliders.