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Relative branching fractions of $B_{d,s}\rightarrow h^{+}h^{'-}$ decays (where $h,h'= K,\pi$) and direct CP asymmetry in $B_d\rightarrow K^+\pi^-$ have been measured with 180 pb$^{-1}$ of CDF II data collected between February 2002 and September 2003. This includes the first measurement of the BR( $B_s\rightarrow K^+K^-$).

Preliminary Results for Summer 2004 Conferences

Branching fractions and CP asymmetries in $B_{d,s}\rightarrow h^{+}h^{'-}$

The CDF II Collaboration

10 August 2004

Simone Donati 2004-08-10