Testing nonperturbative techniques in the scalar sector of the standard model

Details Testing nonperturbative techniques in the scalar sector of the standard model Testing nonperturbative techniques in the scalar sector of the standard model

1998-08-31

arxiv.org/abs/hep-ph/9808497v1

Phys.Rev. D60 (1999) 114003

Physics

High Energy Physics

High Energy Physics - Phenomenology

Scientific paper

10.1103/PhysRevD.60.114003

We discuss the current picture of the standard model's scalar sector at strong coupling. We compare the pattern observed in the scalar sector in perturbation theory up to two-loop with the nonperturbative solution obtained by a next-to-leading order 1/N expansion. In particular, we analyze two resonant Higgs scattering processes, ff -> H -> f'f' and ff -> H -> ZZ, WW. We describe the ingredients of the nonperturbative calculation, such as the tachyonic regularization, the higher order 1/N intermediate renormalization, and the numerical methods for evaluating the graphs. We discuss briefly the perspectives and usefulness of extending these nonperturbative methods to other theories.

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