====== TTP04-09 Two-Loop Sudakov Form Factor in a Theory with Mass Gap ======
 
 
   <hidden TTP04-09  Two-Loop Sudakov Form Factor in a Theory with Mass Gap > 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.
 </hidden>
|**Bernd Feucht, Johann H. K\"uhn, Alexander A. Penin, Vladimir A. Smirnov**  | 
|**  Phys. Rev. Lett.  93 101802 2004  **  |
| {{preprints:2004:ttp04-09.pdf|PDF}} {{preprints:2004:ttp04-09.ps|PostScript}} [[http://arxiv.org/abs/hep-ph/0404082|arXiv]]   |
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