TTP05-17 Two-Loop Electroweak Logarithms in Four-Fermion Processes at High Energy

TTP05-17 Two-Loop Electroweak Logarithms in Four-Fermion Processes at High Energy

TTP05-17 Two-Loop Electroweak Logarithms in Four-Fermion Processes at High Energy

We present the complete analytical result for the two-loop logarithmically enhanced contributions to the high energy asymptotic behavior of the vector form factor and the four-fermion cross section in a spontaneously broken SU(2) gauge model. On the basis of this result we derive the dominant two-loop electroweak corrections to the neutral current four-fermion processes at high energies. Previously neglected effects of the gauge boson mass difference are included through the next-to-next-to-leading logarithmic approximation.

B. Jantzen, J.H. K\“uhn, A.A. Penin, V.A. Smirnov
Nucl.Phys. B731 188-212 2005 Erratum-ibid. B752 (2006) 327-328
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