Two-Loop Sudakov Form Factor in a Theory with Mass Gap

Details Two-Loop Sudakov Form Factor in a Theory with Mass Gap Two-Loop Sudakov Form Factor in a Theory with Mass Gap

2004-04-08

arxiv.org/abs/hep-ph/0404082v2

Phys.Rev.Lett.93:101802,2004

Physics

High Energy Physics

High Energy Physics - Phenomenology

Latex, 5 pages, 2 figures. Bernd Feucht is Bernd Jantzen in later publications. (The contents of the paper is unchanged.)

Scientific paper

10.1103/PhysRevLett.93.101802

The two-loop Sudakov form factor is computed in a U(1) model with a massive gauge boson and a $U(1)\times U(1)$ model with mass gap. We analyze the result in the context of hard and infrared evolution equations and establish a matching procedure which relates the theories with and without mass gap setting the stage for the complete calculation of the dominant two-loop corrections to electroweak processes at high energy.

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