We introduce the computer code Recola for the recursive generation of treelevel and one-loop amplitudes in the Standard Model. Tree-level amplitudes are constructed using off-shell currents insteadâ€¦ (More)

A large set of techniques needed to compute decay rates at the two-loop level are derived and systematized. The main emphasis of the paper is on the two Standard Model decays H â†’ Î³Î³ and H â†’ gg. Theâ€¦ (More)

Using dispersion relations, we derive the complete virtual QED contributions to Bhabha scattering due to vacuum polarization effects. We apply our result to hadronic corrections and to heavy leptonâ€¦ (More)

In part I and II of this series of papers all elements have been introduced to extend, to two loops, the set of renormalization procedures which are needed in describing the properties of aâ€¦ (More)

In this paper we present a numerical implementation of the one-loop QED corrections to the hard-bremsstrahlung process eâˆ’e+ â†’ eâˆ’e+Î³. These corrections can be included in the Monte Carlo eventâ€¦ (More)

In this paper the building blocks for the two-loop renormalization of the Standard Model are introduced with a comprehensive discussion of the special vertices induced in the Lagrangian by aâ€¦ (More)

Recent developments in the computation of two-loop master integrals for massive Bhabha scattering are briefly reviewed. We apply a method based on expansions of exact Mellin-Barnes representationsâ€¦ (More)

A comprehensive study is performed of general massive, tensor, two-loop Feynman diagrams with two and three external legs. Reduction to generalized scalar functions is discussed. Integralâ€¦ (More)

In part I general aspects of the renormalization of a spontaneously broken gauge theory have been introduced. Here, in part II, two-loop renormalization is introduced and discussed within the contextâ€¦ (More)

A comprehensive study is performed of general massive, tensor, two-loop Feynman diagrams with two and three external legs. Reduction to generalized scalar functions is discussed and integralâ€¦ (More)