We look at two methods to determine the weak phases Ο2β and Ο3β
from BβΟΟ and KΟ decays within the perturbative QCD approach. We
obtain quite interesting bounds on Ο2β and Ο3β from recent
experimental measurements in asymmetric B-factory: 55oβ€Ο2ββ€100o and 51oβ€Ο3ββ€129o. Specially we predict the possibility
of large direct CP violation effect in B0βΟ+Οβ decay with
Acpdirβ(BβΟ+Οβ)=(23Β±7) %.Comment: 6 pages, Latex, 3 figures, typos corrected. Presented at Workshop on
CKM Unitarity Triangle (CERN 2002-2003), Geneva, Switzerland, 13-16 Feb 200