2000/11/15 by A. V. Anisovich, Anisovich, A. V., V.V. Anisovich +4
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Nuclear physics research studies #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/0011191
some typos corrected, Fig 4. presented in more suitable form, some references are changed
openalex publication_date 2000/11/15 · arxiv created 2001/03/27 · arxiv updated 2009/11/30 · openalex created_date 2024/04/11 · openalex updated_date 2026/07/28
Partial widths of the radiative decays ϕ(1020)→γf0(980), γη, γη', γπ0 and f0(980)→γγ are calculated assuming all mesons under consideration to be q q states: ϕ(1020) is dominantly an s s state (n n component \lesssim 1%), η, η' and π0 are standard q q states, η= n ncosθ- s ssinθ and η'=n nsinθ+ s scosθ with θ≃ 37^∘, and f0(980) is the q q meson with the flavour wave function n ncosϕ+ s s sinϕ. Calculated partial widths for the decays ϕ→γη, γη', γπ0 are in a reasonable agreement with experiment. The measured value of the branching ratio BR(ϕ→γf0(980)) requires 25^∘≤ |ϕ|≤ 90^∘; for the decay f0(980)→γγ the agreement with data is reached at either 77^∘≤ϕ≤ 93^∘ or (-54^∘)≤ϕ≤ (-38^∘). Simultaneous analysis of the decays ϕ(1020)→γf0(980) and f0(980)→γγ provides arguments in favour of the solution with negative mixing angle ϕ=-48^∘± 6^∘.