Zhi-zhong Xing
Published 2003-08-22, updated 2003-09-16Version 2
The recent observation of B^0_d->\pi^0\pi^0 and \bar{B}^0_d->\pi^0\pi^0 decay modes allows us to make a fresh isospin analysis of B->\pi\pi transitions. We find that current experimental data can impose some model-independent constraints on the parameter space of direct CP violation in B_d->\pi^+\pi^- and B_d->\pi^0\pi^0. Furthermore, we establish a direct relationship between the weak phase \alpha and the charge-averaged branching fractions and CP-violating asymmetries of B->\pi\pi decays.
Comments: RevTex 9 pages (1 PS figure included). More discussions with new equations and references added. Accepted for publication in PRD (Rapid Communication)
Journal: Phys.Rev. D68 (2003) 071301
Model-independent Constraints on the Weak Phase $α$ (or $φ_2$) and QCD Penguin Pollution in $B \to ππ$ Decays
CP violating dimuon charge asymmetry in general left-right models
Benchmarks for the New-Physics Search through CP Violation in B^0->pi^0 K_S
