Two-Loop Sudakov Form Factor in a Theory with Mass Gap
classification
✦ hep-ph
keywords
masstwo-loopfactorformmodelsudakovanalyzeboson
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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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