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VOLUME 81 (2005) | ISSUE 9 | PAGE 531
Observation of tensor glueball in the reactions \boldsymbol{p\bar p\to\pi\pi,\eta\eta,\eta\eta'}
PACS: 12.38.-t, 12.39.-MK, 14.40.-n
Abstract
Partial wave analysis of the reactions p\bar p\to\pi\pi,\eta\eta,\eta\eta' in the region of invariant masses 1900-2400 MeV indicates to the existence of four relatively narrow tensor-isoscalar resonances f2(1920), f2(2020), f2(2240), f2(2300) and the broad state f2(2000). The determined decay couplings of the broad resonance f2(2000)→π0π0,ηη, ηη' satisfy the relations appropriate to those of tensor glueball, while the couplings of other tensor states do not, thus verifying the glueball nature of f2(2000).