This prediction shows better agreement with data for the π^0η mass spectrum, highlighting contributions from chiral loops and the LσM model.
A prediction for the contributions of chiral loops and the LσM model to the radiative ϕ->π^0ηγ decay mode is presented.The LσM is used as an appropriate framework for describing the pole effects of the a_0(980) scalar resonance.As a result, a better agreement with present available data is achieved for the higher part of the π^0η invariant mass spectrum.For the branching ratio, a value of B(ϕ->π^0ηγ)=(0.75-0.95)10⁻⁴ is found.
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Escribano R. (2000) studied this question.
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