https://doi.org/10.1140/epjcd/s2004-03-1831-x
PS03 CP Violation
CP violation in B decays within QCD factorization
Ludwig-Maximilians-Universität München, Sektion Physik, Theresienstraße 37, D-80333 Munich, Germany
Received:
11
November
2003
Accepted:
22
November
2003
Published online:
9
April
2004
We analyze the extraction of weak phases from CP violation in B→π
+
π
– decays. By combining the information on mixing induced CP violation in B→π
+
π
–, namely S
π
π
, with the precision observable 
obtained from the “gold-plated”mode B→ψ
K
S
, we propose the determination of the unitarity triangle. We also discuss alternative ways to analyze S
π
π
which can be useful if new physics affects B
d
–
mixing. Predictions and uncertainties for r and φ in QCD factorization are examined in detail. It is pointed out that a simultaneous expansion in 1/m
b
and 1/N
C
leads to interesting simplifications. At first order infrared divergences are absent, while the most important effects are retained. Independent experimental tests of the factorization framework are briefly discussed.
PACS: 11.30.Er – 12.15.Hh – 13.25.Hw
© Società Italiana di Fisica, Springer-Verlag, 2004
