Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2006-12-11
Nucl.Phys.Proc.Suppl.170:39-45,2007
Physics
High Energy Physics
High Energy Physics - Experiment
Proceedings for Beauty 2006, Sept. 25-29 at Oxford University, to be published in Nucl. Phys. (Proc. Suppl.). FERMILAB-CONF-06
Scientific paper
10.1016/j.nuclphysbps.2007.05.00
We present new CDF results on the branching fractions and time-integrated direct CP asymmetries for $B^{0}$ and $B^{0}_{s}$ decay modes into pairs of charmless charged hadrons (pion or kaon). The data set for this update amounts to 1 fb$^{-1}$ of $\bar{p}p$ collisions at $\sqrt{s}=1.96 \rm{TeV}$. We report the first observation of the $B^{0}_{s} \to K^{-}\pi^{+}$ mode and a measurement of its branching fraction and direct CP asymmetry. We also observe for the first time two charmless decays of $b$-baryon: $\Lambda^{0}_{b} \to p\pi^{-}$ and $\Lambda^{0}_{b} \to pK^{-}$.
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