Does the existence of f₀ meson enlarge the K⁺ → π⁰π⁰π⁰ e⁺ ν decay probability?

2025/06/10 by E. K. Karkaryan, V. Obraztsov, Karkaryan, E. K. +3
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph) #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #Quantum and Classical Electrodynamics

paper · doi:10.48550/arxiv.2506.09179

openalex publication_date 2025/06/10 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We estimate a possible contribution of the two-pion system f₀(500) wide resonance to the decay probability of the super rare decay K⁺ → 3π⁰ e⁺ ν. We vary the width of the resonance from 0.01 MeV to 1000 MeV. We found that the contribution of the narrow resonance in a system of several final state particles into the decay probability is proportional to its width. However it never exceeds the value of the decay probability calculated on free final state particles neglecting the resonance contribution.

Citations

• Review of Particle Physics

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