Measurements of CP violation in charmless 3-body B meson decays at LHCb
Charmless 3-body B-meson decays can present significant $C\!P$ asymmetries. Large raw $C\!P$ asymmetries were observed in $B^+ \rightarrow \pi^+ K^+K^-$ and $B^+ \rightarrow \pi^+ \pi^+\pi^-$ decays by the LHCb collaboration. The most recent results from LHCb are discussed here. They include amplitude analyses of $B^+ \rightarrow \pi^+ K^+K^-$ and $B^+ \rightarrow \pi^+ \pi^+\pi^-$ decays. The study of $B^+ \rightarrow \pi^+ K^+K^-$ reported a large $C\!P$ asymmetry arising from the S-wave. In the case of the $B^+ \rightarrow \pi^+ \pi^+\pi^-$ decay analysis, the first observation of $C\!P$ violation in a process involving a tensor was made.
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