Discovery of a glueball-like particle X(2370) at BESIII

Radiative decays of the [Formula: see text] particle are of gluon-rich environment, providing an ideal place for hunting glueballs. The X(2370) particle was first discovered in [Formula: see text] process in 2011 with the BESIII experiment at the BEPCII Collider, and later it was confirmed in [Formula: see text] decays. In 2024, with a sample of 10 billion [Formula: see text] events collected at the BESIII detector, the spin-parity of the [Formula: see text] was determined to be [Formula: see text] for the first time in the partial wave analysis of [Formula: see text] process. Recently, new decay modes of the [Formula: see text], [Formula: see text] and [Formula: see text] were observed. The mass, spin-parity quantum numbers, production and decay properties of the X(2370) particle are consistent with the features of the lightest pseudoscalar glueball.