Abstract:BESIII has the world's largest samples of π½/π and π(3686) events from π + π β annihilations, which offer an ideal laboratory to study light meson spectroscopy, in particular for the search of QCD exotics with gluonic excitations. The observation of a 1 β+ state, π 1 (1855) in π½/π β πΎππ β² , the observation of the π (2600) in π½/π β πΎπ + π β π β² , and the observation of π½/π Electromagnetic Dalitz Decays to π (1835), π (2120) and π (2370) will be discussed in this proceeding.
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