BESIII Collaboration Observes New Charmonium-like Particle X(3790)^-

The BESIII Collaboration has reported the observation of a new charged charmonium-like structure, X(3790)^-, produced in electron-positron collisions. This particle has quantum numbers J^P=1^- and a mass of approximately 3794.7 MeV/c^2. This significant experimental finding advances the understanding of subatomic particles within high energy physics.