NBI Particle Physics Seminar: Discovery of a Glueball-like Particle X(2370) at BESIII

Monday 25 Aug 2025, 14:00 → 15:30 Europe/Copenhagen

NBB (NBI)

You Zhou (Niels Bohr Institute)

Title: Discovery of a Glueball-like Particle X(2370) at BESIII 

Speaker: Professor Shan Jin (Nanjing University)

Abstract: Radiative decays of the J/ψ particle are of gluon-rich environment, providing an ideal place for hunting glueballs. The X(2370) particle was first discovered in J/ψ →γπ⁺π^-η’ process in 2011 with the BESIII experiment at BEPCII Collider, and later it was confirmed in J/ψ →γ KKη’ decays. In 2024, with a sample of 10 billion J/ψ events collected at the BESIII detector, the spin-parity of the X(2370) was determined to be 0-+ for the first time in the partial wave analysis of J/ψ →γK_s⁰K_s⁰η’process. Recently, new decay modes X(2370)→K_s⁰K_s⁰π⁰, π⁰π⁰η and a⁰π⁰ 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.

Time: August 25th, 2025, at 2 PM

Location: NBB Margrethe Bohr Hall