What question did this study set out to answer?

The research aims to predict contributions to the ϕ->π^0ηγ decay based on chiral loops and the LσM model.

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March 5, 2026Open Access

Chiral loop and LσM predictions for ϕ->π⁰ηγ

Key Points

The research aims to predict contributions to the ϕ->π^0ηγ decay based on chiral loops and the LσM model.
Utilized the LσM framework to assess pole effects of the a_0(980) resonance
Analyzed the invariant mass spectrum of π^0η
Computed the branching ratio for the decay mode.
Achieved better agreement with existing data for the upper π^0η invariant mass spectrum
Determined branching ratio of B(ϕ->π^0ηγ)=(0.75-0.95)10^{-4}.

Abstract

A prediction for the contributions of chiral loops and the LσM model to the radiative ϕ->π⁰ηγ decay mode is presented. The LσM is used as an appropriate framework for describing the pole effects of the a₀ (980) scalar resonance. As a result, a better agreement with present available data is achieved for the higher part of the π⁰η invariant mass spectrum. For the branching ratio, a value of B (ϕ->π⁰ηγ) = (0. 75-0. 95) 10^-4 is found.

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