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

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

2005-09-15

arxiv.org/abs/hep-ph/0509157v4

Nucl.Phys.B731:188-212,2005; Erratum-ibid.B752:327-328,2006

Physics

High Energy Physics

High Energy Physics - Phenomenology

29 pages, 6 figures. Bernd Jantzen was Bernd Feucht in previous publications. v2: references added, version in Nucl. Phys. B.

Scientific paper

10.1016/j.nuclphysb.2005.10.010

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.

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