2006/09/30 by Patricia Ball, Roman Zwicky · 1 citation
Mathematics · Physics and Astronomy · #Algorithm #Asymmetry #Factorization #Hadron #High-Energy Particle Collisions Research #Mathematics #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Zero (linguistics) #hep-ex #hep-ph
paper · pdf · doi:10.1016/j.physletb.2006.10.013
published as Phys.Lett.B642:478-486,2006 · 14 pages, 1 figure, discussions on further power corrections added
arxiv created 2006/10/17 · openalex publication_date 2006/10/20 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We calculate the dominant Standard Model contributions to the time-dependent CP asymmetry in B0→K∗0γ, which is O(1/mb) in QCD factorisation. We find that, including all relevant hadronic effects, in particular from soft gluons, the asymmetry S is very small, S=−0.022±0.012±0.01−0.01+0, and smaller than suggested recently from dimensional arguments in a 1/mb expansion. Our result implies that any significant deviation of the asymmetry from zero, and in particular a confirmation of the current experimental central value, SHFAG=−0.28±0.26, would constitute a clean signal for new physics.