2000/11/14 by Z. J. Xiao, Zhenjun Xiao, Wenjun Li +5 · 2 citations
Computer Science · Physics and Astronomy · #Computational Physics and Python Applications #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #hep-ph
paper · pdf · doi:10.1007/s100520100562
published as Eur.Phys.J.C18:681-709,2001 · Latex file, 56 pages with 11 ps and eps figures. to be published in Eur.Phys.J. C
arxiv created 2000/11/14 · openalex publication_date 2001/01/01 · arxiv updated 2009/11/30 · openalex created_date 2019/06/27 · openalex updated_date 2026/07/28
Based on the low energy effective Hamiltonian with generalized factorization, we calculate the new physics contributions to the branching ratios and CP-violating asymmetries of the two-body charmless hadronic decays B → PP, PV from the new strong and electroweak penguin diagrams in the TC2 model. The top-pion penguins dominate the new physics corrections, and both new gluonic and electroweak penguins contribute effectively to most decay modes. For tree-dominated decay modes B → ππ, ρπ, etc, the new physics corrections are less than 10%. For decays B → K(*) π, K(*) η, etc, the new physics enhancements can be rather large (from - 70% to ∼ 200%) and are insensitive to the variations of Nceff, k2, η and mπ within the reasonable ranges. For decays B0 → ϕπ, ϕη('), K^* K0 and ρ+ K0, δ\cal B is strongly Nceff-dependent: varying from -90% to ∼ 1680% in the range of Nceff=2-∞. The new physics corrections to the CP-violating asymmetries \cal ACP vary greatly for different B decay channels. For five measured CP asymmetries of B → K π, K η', ωπ decays, δ\cal ACP is only about 20% and will be masked by large theoretical uncertainties. The new physics enhancements to interesting B → K η' decays are significant in size (∼ 50%), insensitive to the variations of input parameters and hence lead to a plausible interpretation for the unexpectedly large B → K η' decay rates. The TC2 model predictions for branching ratios and CP-violating asymmteries of all fifty seven B → PP, PV decay modes are consistent with the available data within one or two standard deviations.