Studies of hadron spectroscopy are at the frontier of modern particle physics to promote the understanding of the nonperturbative property of low energy QCD. Multibody B decays provide a unique platform for the experimental studies of excited hadrons (resonances). The information of the B decay topology enables the utilization of amplitude analysis, a powerful technique that can precisely determine the mass, width, as well as spin-parity, of excited hadrons. The LHCb experiment is dedicated for efficient and precise reconstruction of heavy-flavor hadrons, and thus is an ideal platform for the studies of intermediate resonances in B decays. In this seminar, I will present some recent studies of hadron spectroscopy to multibody B decays at LHCb. New resonances containing charm quark(s) were observed with their properties measured using amplitude analysis, providing important experimental inputs to theoretical studies of hadron spectroscopy.
