[Seminar] Scalar Mesons and the Fragmented Glueball

Monday 19 Apr 2021, 15:00 → 17:00 Asia/Shanghai

Online (ZOOM)

Seminar
Title 题目	Scalar Mesons and the Fragmented Glueball
Speaker 报告人	Prof. Eberhard Klempt
Affiliation 所在单位	Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn
Date 日期	19 Apr 2021, 15:00
Venue 地点	https://zoom.us/j/94437263471
Contact Person 所内联系人	邹冰松
Abstract 摘要	Evidence for the scalar glueball is reported. The evidence stems from an analysis of BESIII data on radiative J/ψ data into π0π0, KSKS, ηη, andϕω. The coupled-channel analysis is constrained by a large number of further data. The data are described by ten scalar isoscalar mesons, covering the range from f0(500) to f0(2330). Five resonances are interpreted as mainly-singlet states in SU(3), ve as mainly-octet states. The mainly-singlet resonances are produced over the full mass range, the production of octet state is limited to the 1500 to 2100MeV mass range. The peak is interpreted as scalar glueball. Its mass, width and yield are determined to Mglueball = (1865+-25)MeV, Γglueball = (370+-50^{+30}_{-20})MeV, YJ/ψ→ γG0 = (5.8 +-1.0) x10-3.