New Observations On Light Hadron Spectroscopy At Besiii

With samples of 220 million J/Psi events and 110 million Psi' events collected in the BESIII detector, p (p) over bar mass threshold enhancement is studied. The enhancement is evident in J/Psi radiative decay, which is consistent with BESII result. No significant narrow enhancement is observed in Psi' radiative decay. For J/Psi -> gamma pi(+)pi(-)eta' decay, the X(1835), which was previously observed by BESII, is confirmed with a statistical significance that is larger than 20 sigma. In addition, in the pi(+)pi(-)eta' invariant mass spectrum, the X(2120) and the X(2370), are observed with statistical significances larger than 7.2 sigma and 6.7 sigma, respectively. A new process J/Psi -> omega X (1870) -> omega alpha(0)pi is also observed in J/Psi -> omega pi(+)pi(-) eta decay.