Exact O(g^2 alpha_s) top decay width from general massive two-loop integrals

Details Exact O(g^2 alpha_s) top decay width from general massive two-loop integrals Exact O(g^2 alpha_s) top decay width from general massive two-loop integrals

2000-02-19

arxiv.org/abs/hep-ph/0002211v1

Mod.Phys.Lett. A15 (2000) 925-930

Physics

High Energy Physics

High Energy Physics - Phenomenology

Scientific paper

We calculate the b-dependent self-energy of the top quark at O(g^2 \alpha_s) by using a general massive two-loop algorithm proposed in a previous article. From this we derive by unitarity the O(\alpha_s) radiative corrections to the decay width of the top quark, where all effects associated with the $b$ quark mass are included without resorting to a mass expansion. Our results agree with the analytical results available for the O(\alpha_s) correction to the top quark width.

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