Measurement of branching fractions and CP violation in B mesons decaying to charmed eta mesons and kaons and observation of B(+/-) mesons decaying to proton-antiprotons and kaons(+/-)

We report measurements of branching fractions for charged and neutral B → η_cK decays, and determine the η_c, mass and width. The results are based on an analysis of 29.1 fb−1 of data collected by the Belle detector at KEKB. We also report a measurement of the CP violation parameter sin(2&phis;₁) in B 0 → $hcK0S$ based on an analysis of a 78 fb−1 of data sample.; We report the observation of the decay mode B± → pp¯K± based on an analysis of 29.4 fb −1 of data collected by the Belle detector at KEKB. This is the first example of a b → s transition with baryons in the final state. The pp¯ mass spectrum in this decay is inconsistent with phase space and is peaked at low mass. The branching fraction for this decay is measured to be $BB\pm \to \; ppK\pm =4.7+1.1-0.9stat\pm 0.5syst\times 10-6$. We also report upper limits for the decays B 0 → and B± → pp¯π ±.