2007/03/31 by Hong Chen, Rong-Gang Ping
Physics and Astronomy · #Branching fraction #Fraction (chemistry) #Mechanism (biology) #Nuclear physics research studies #Particle physics theoretical and experimental studies #Production (economics) #Production rate #Quantum Chromodynamics and Particle Interactions #Resonance (particle physics) #hep-ph
paper · pdf · doi:10.1088/0954-3899/34/12/012
published as J.Phys.G34:2679-2690,2007 · 4 figures, 10 pages
arxiv created 2007/11/09 · openalex publication_date 2007/11/16 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We investigate the decay and the production mechanism of the resonance X(1812) recently observed in the \jp→γ X(1812), X(1812)→ωφ at BESII. The decay widths of X(1812)→ηη', ηη, ωφ, K+K-, ρ+ρ-, ωω, K*+K*- and π+π- are evaluated based on the scenario of the X(1812) as a candidate of (\ksks) molecule. It turns out that the quark exchange mechanism plays an important role in the understanding of the large decay width for the X(1812)→ωφ. It is also found that the decay widths for X(1812)→ηη' and ηη are enhanced by the quark exchange mechanism. These channels are suggested to be the tools to test the molecular scenario in experiment. The branching fraction of Br(X→ωφ) is evaluated to be about 4.60%. Searches for additional evidence about the X(1812) in \jp radiative decays are reviewed. In the molecular scenario, the X(1812) production rate is also evaluated to be Γ(\jp→γ X)/Γ(\jp→γ K*+K*-)=2.13+7.41-1.85, which is close to the measured value 2.83±0.92.