Searches for $B^0_{(s)} \to J/\psi p\bar{p}$ and $B^+ \to J/\psi p\bar{p}\pi^+$ decays

The results of searches for $B^0_{(s)} \to J/\psi p\bar{p}$ and $B^+ \to J/\psi p\bar{p}\pi^+$ decays are reported. The analysis is based on a data sample, corresponding to an integrated luminosity of 1.0 fb$^{-1}$ of $pp$ collisions, collected with the LHCb detector. An excess with 2.8 $\sigma$ significance is seen for the decay $B^0_{s} \to J/\psi p\bar{p}$ and an upper limit on the branching fraction is set at the 90% confidence level: $B(B^0_s \to J/\psi p\bar{p}) \lt$ 4.8 x 10$^{-6}$, which is the first such limit. No significant signals are seen for $B^0 \to J/\psi p\bar{p}$ and $B^+ \to J/\psi p\bar{p}\pi^+$ decays, for which the corresponding limits are set: $B(B^0 \to J/\psi p\bar{p}) \lt$ 5.2 x 10$^{-7}$, which significantly improves the existing limit; and $B(B^+ \to J/\psi p\bar{p}\pi^+) \lt$ 5.0 x 10$^{-7}$, which is the first limit on this branching fraction.