Charmless decays B→PP,PV, and the effects of new strong and electroweak penguins in topcolor-assisted technicolor model

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 topcolor-assisted technicolor (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(*)πK(*)η,π0η('),η(')η('),KK0,K*0 K, 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 reasonable ranges. For the decays B0 →φπ, φη('), K*K0 and ρ+ K0,δB is strongly Nceff dependent: varying from -90% to ∝1680/% in the range of Nceff=2-∞. The new physics corrections to the CP-violating asymmetries ACP vary greatly for different B decay channels. For five measured CP asymmetries of the B →K π,K η',ωpi decays, δACP 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 the 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 asymmetries of all fifty-seven B→PP,PV decay modes are consistent with the available data within one or two standard deviations. (orig.)