SMuK 2021 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 29: Hadron Structure and Spectroscopy VI

HK 29.1: Gruppenbericht

Freitag, 3. September 2021, 14:00–14:30, H3

The scalar glueball from radiative J/psi decays — •Eberhard Klempt¹, Igor Denisenko², Andrey Sarantsev³, and Ulrike Thoma¹ — ¹Hiskp, Universität Bonn — ²Jinr, Dubna — ³Pnpi, Gatchina

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, and Φω. The coupled-channel analysis is contrained 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), five 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 2100 MeV mass range. The peak is interpreted as scalar glueball. Its mass, width and yield are determined.