Speaker
Weimin Song
(Jilin University College of Physics (CN))
Description
Based on a sample of 448 million psi(2S) events and a scan data sample above 3.7 GeV with an integrated luminosity of 22/fb, charmonium spectroscopy and decays are studied. In the talk the latest results will be presented. The production of psi2(3823) via e+e- -> pi+ pi- psi2(3823) is measured, the most precise measurement of the mass of psi2(3823) is achieved, and the new decay modes of psi2(3823) -> gamma chic2, gamma chic0, pi pi J/psi, eta J/psi, and pi0 J/psi are searched. The new decay modes of hc -> p p-bar eta, p p-bar pi0, p p-bar pi+ pi- pi0, pi0 J/psi are searched for, the mode of p p-bar eta is observed for the first time with significance above 5.0 sigma while evidence of p p-bar pi+ pi- pi0 is found.
| Preferred track | Hadron Spectroscopy |
|---|---|
| Subfield | HEP experiment |
| Attending in-person? | Yes |
| On behalf of collaboration? | BESIII |
