Amplitude analyses and results on three-body charmless hadronic B decays from LHCb

Charmless b -hadron decays in the Standard Model are characterised by tr ee amplitudes that are in general comparable in size to loop amplitudes, and potent ially by New Physics amplitudes. CP -violation measurements using Dalitz-plot analyses in mul ti-body decays enable the various contributions to be disentangled. We present the most recen t measurements in this sector, notably results on B + c → K + K − π + , B d , s → φ π + π − , and suppressed B 0 → 3 h decays, where h is a kaon or a pion.