Study Of The Structure Of Neutral Scalar Meson And Electromagnetic Radiation Decay Of φ Meson

QCD sum rule is one of the most important nonpertubative methods and has become a powerful tool in hadrons phenomenology. This article introduced the foundation and basic step of the theory,in partically basic thought,characteristics and differentiation of SVZ sum rule and light-cone QCD sum rule.According to the current the experimental value from the electromagnetic radiation ofφmeson for a0(980)or f0(980)meson,the large value of coupling constants gφa0r implied that a0(980)could have a ss composition. So we make a following assumption:│a0>=cosβ│nn>+sinβ│ss>,│σ>=-cosα│qq>-Sinα│ss>,and│f0>=sinα│qq>-cosα│ss>,where│nn>=(│uu>-│dd>/(?),│qq>=(│uu>+│dd>)/(?).The parametersα,βare the mixing angles. And then, we investigate radiation decaysφ→Sγby utilizingω-φmixing scheme,taking into account of all contributions of the twist-4 photon three-particle distribution amplititudes and the SU(3)flavor symmetric breaking effect.At the same time,we use these coupling constants to derive decay width ofφ→Sγprocesses,and compare our result with experimental data in our model.Finally,Our result are listed as following:(1)φ→a0γdecay:gφa0γ=1.642±0.051 withβ=59.3°±3.7°and GeV is consisted with the experimental result from PDG；(2)φ→f0γandφ→σγdecays:Whenα=4.7°±0.3°, gφf0γ=1.69±0.32 and gφσγ=0.060±0.012 are agreement with the experimental result from KLOE, respectively.But GeV is less than the results from PDG. There be no experimental data for (?)→σγand Our prediction is GeV in our model.