Measurement of CP Asymmetries and Branching Fractions in Charmless Two-Body B-Meson Decays to Pions and Kaons

The BABAR Collaboration

We present improved measurements of CP-violation parameters in the decays $B^0\to {\pi }^{+}{\pi }^{-}$, $B^0\to K^{+}{\pi }^{-}$, and $B^0\to {\pi }^0{\pi }^0$, and of the branching fractions for $B^0 \to π…