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Dynamics and direct $C\P$ violation in three-body charmless decays of charged$B$ mesons to a proton, an antiproton and a light meson (pion or kaon) arestudied using data, corresponding to an integrated luminosity of 1.0${\,fb}^{-1}$, collected by the ${LHCb}$ experiment in $pp$ collisions at acenter-of-mass energy of 7 TeV. Production spectra are determined as a functionof Dalitz-plot and helicity variables. The forward-backward asymmetry of thelight meson in the $p\bar p$ rest frame is measured. No significant $C\P$asymmetry in $B^+ \to p \bar p K^+$ decay is found in any region of the Dalitzplane. We present the first observation of the decay $B^+ \to \kern0.1em\bar{\kern -0.1em\Lambda}(1520)(\to K^+\bar p)p$ near the $K^+\bar p$threshold and measure $\mathcal{B}(B^+ \to \kern 0.1em\bar{\kern-0.1em\Lambda}(1520)p)=(3.9^{+1.0}_{-0.9} (\mathrm{stat})\pm0.1(\mathrm{syst})\pm0.3 (\mathrm{BF}))\times 10^{-7}$, where BF denotes theuncertainty on secondary branching fractions.

Studies of the decays $B^+ \to p \bar p h^+$ and observation of $B^+ \to \kern 0.1em\bar{\kern -0.1em\Lambda}(1520)p$