CharmlessBdecays involving baryons

Predictions are made for the fraction of B-meson decays involving specific final states of NN¯+nπ (n≥0), as functions of (a) decay dynamics, (b) models for multipion production, (c) the isospin of the final state, and (d) the ratio ‖$V_{\mathrm{bu}}$/$V_{\mathrm{bc}}$‖ of Kobayashi-Maskawa matrix elements. From recent observations of $B^{+}$→pp¯${\pi }^{+}$(+c.c.) and $B^0$→pp¯${\pi }^{+}$ ${\pi }^{\mathrm{-}}$ by the ARGUS Collaboration, it is concluded that ‖$V_{\mathrm{bu}}$/$V_{\mathrm{bc}}$‖≳0.08, similar to the ARGUS Collaboration’s own estimate of 0.07. However, a more likely value for this ratio is near its present experimental upper limit. Predictions are made for further final states in NN¯+nπ and in other charmless B decays. We also comment briefly on prospects for observing CP violation in B→NN¯+nπ.