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The results of searches for $B^{0}_{(s)} \rightarrow J/{\psi} p \overline{p}$and $B^{+} \to J/{\psi} p \overline{p} {\pi}^{+}$ decays are reported. Theanalysis is based on a data sample, corresponding to an integrated luminosityof 1.0 fb$^{-1}$ of $pp$ collisions, collected with the LHCb detector. Anexcess with 2.8$\,\sigma$ significance is seen for the decay $B^{0}_{s} \toJ/{\psi} p \overline{p}$ and an upper limit on the branching fraction is set atthe 90 % confidence level: ${\cal B}(B^{0}_{s} \to J/{\psi} p \overline{p}) <4.8 \times 10^{-6}$, which is the first such limit. No significant signals areseen for $B^{0} \to J/{\psi} p \overline{p}$ and $B^{+} \to J/{\psi} p\overline{p} {\pi}^{+}$ decays, for which the corresponding limits are set:${\cal{B}}(B^{0} \to J/{\psi} p \overline{p}) < 5.2 \times 10^{-7}$, whichsignificantly improves the existing limit; and ${\cal{B}}(B^{+} \to J/{\psi} p\overline{p} {\pi}^{+}) < 5.0 \times 10^{-7}$, which is the first limit on thisbranching fraction.

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