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Article
Report number	hep-ph/0209002 ; DPNU-2002-28
Title	Determination of weak phases $\phi_2$ and $\phi_3$ from $B \to \pi\pi,K\pi$ in the pQCD method : future directions
Author(s)	Keum, Yu Y
Publication	CERN, 2003
Imprint	2 Sep 2002
Number of pages	6
In:	The CKM Matrix and the Unitarity Triangle, pp.251-254
DOI	10.5170/CERN-2003-002-corr.251
Subject category	Particle Physics - Phenomenology
Abstract	We look at methods to determine the weak phases $\phi_2$ and $\phi_3$ from $B \to \pi\pi$ and $K\pi$ decays within the perturbative QCD approach. We obtain quite interesting bounds on $\phi_2$ and $\phi_3$ from experimental measurement in B-factory: $55^o \leq \phi_2 \leq 100^o$ and $51^o \leq \phi_3 \leq 129^o$. Specially we predict the possibility of large direct CP violation effect in $B^0 \to \pi^{+}\pi^{-} (23\pm7 %)$ decay.

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