Ref Arxiv: hep-ph/0103335
DOI: 10.1103/PhysRevD.64.073008
Ref. & Cit.: NASA ADS
26 citations
Résumé:

We consider the separate effects on four-fermion processes, in the TeV energy range, produced at one loop by Sudakov logarithms of universal and nonuniversal kind, working in the ’t Hooft ξ=1 gauge. Summing the various vertex and box contributions allows us to isolate two quite different terms. The first one is a combination of vertex and box quadratic and linear logarithms that are universal and independent of the scattering angle θ. The second one is θ dependent, not universal, linearly logarithmic, and produced only by weak boxes. We show that for several observables, measurable at future linear e+e- colliders, the role of the latter term is dominant, and we discuss the implications of this fact for what concerns the reliability of a one-loop approximation.