Next-to-next-to-leading order calculations for heavy-to-light decays

Details Next-to-next-to-leading order calculations for heavy-to-light decays Next-to-next-to-leading order calculations for heavy-to-light decays

2005-03-03

arxiv.org/abs/hep-ph/0503039v2

Phys.Rev.D71:054004,2005

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, corrected typos in the appendix

Scientific paper

10.1103/PhysRevD.71.054004

We present technical aspects of next-to-next-to-leading order calculations for heavy-to-light decays such as top quark decay, semileptonic b quark decay into a u quark, muon decay, and radiative decays like b -> s gamma. Algebraic reduction of integrals to a set of master integrals is described, methods of determining the master integrals are presented, and a complete list of master integrals is given. As a sample application, the top quark decay width is calculated to O(alpha_s^2) accuracy.

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