1997/02/28 by Zoltan Ligeti, Lisa Randall, Mark B. Wise · 6 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(97)00304-3
published as Phys.Lett.B402:178-182,1997 · 9 pages revtex, 2 figures included; minor changes, to appear in Phys. Lett. B
arxiv created 1997/04/21 · openalex publication_date 1997/06/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
Uncertainties in the theoretical prediction for the inclusive B→ Xsγ decay rate are discussed. We emphasize that there is no operator product expansion for this process. Nonetheless, some nonperturbative effects involving a virtual c c loop are calculable using the operator product expansion. They give a contribution to the decay rate that involves the B meson matrix element of an infinite tower of operators. The higher dimension operators give effects that are only suppressed by powers of mbΛQCD/mc2 ∼ 0.6, but come with small coefficients.