Nonperturbative three-point functions of the O(N) sigma model in the 1/N expansion at NLO

Abstract

We present a calculation of the three-point functions of the O(N)-symmetric sigma model. The calculation is done nonperturbatively by means of a higher-order 1/N expansion combined with a tachyonic regularization which we proposed in previous publications. We use the results for calculating the standard model process ff -> H -> WW nonperturbatively in the quartic coupling of the scalar sector.

References in corpus (2)

• Radiative corrections to the lineshape of a heavy Higgs boson at muon colliders
• Higgs mass saturation effect and the LHC discovery potential

Cited by in corpus (1)

• Renormalized broken-symmetry Schwinger-Dyson equations and the 2PI-1/N expansion for the O(N) model