Seminar |
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Title 题目 |
Scalar Mesons and the Fragmented Glueball |
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Speaker 报告人 |
Prof. Eberhard Klempt |
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Affiliation 所在单位 |
Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn |
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Date 日期 |
19 Apr 2021, 15:00 |
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Venue 地点 |
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Contact Person 所内联系人 |
邹冰松 |
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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. |