2000/08/08 by C. Greub, P. Liniger, Patrick Liniger · 2 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.1016/s0370-2693(00)01205-3
published as Phys.Lett.B494:237-247,2000 · 14 pages including 5 postscript figures; uses epsfig
arxiv created 2000/08/08 · openalex publication_date 2000/11/01 · arxiv updated 2011/01/05 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We calculate the alphas virtual corrections to the decay width for b --> s gluon in the standard model. Also the corresponding order alphas bremsstrahlung corrections are systematically calculated in this paper. The combined result is free of infrared and collinear singularities, in accordance with the KLN theorem. Taking into account the existing next-to-leading logarithmic (NLL) result for the Wilson coefficient C8^(eff), a complete NLL result for the branching ratio B(b -> s gluon) is derived. Numerically, we obtain B^(NLL)=(5.0 +/- 1.0) * 10-3, which is more than a factor of two larger than the leading logarithmic result B^(LL)=(2.2 +/- 0.8) * 10-3.