f0介子的存在会增加K+→π0π0π e+ν的衰变概率吗？

IF 1.3 4区物理与天体物理 Q3 PHYSICS, MULTIDISCIPLINARY

JETP Letters Pub Date : 2025-07-25 DOI:10.1134/S0021364025607481

E. K. Karkaryan, V. F. Obraztsov, M. I. Vysotsky

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引用次数: 0

摘要

我们估计了双介子系统\({{f}_{0}}(500)\)宽共振对超稀有衰变\({{K}^{ + }} \to 3{{\pi }^{0}}{{e}^{ + }}\nu \)的衰变概率的可能贡献。我们改变共振的宽度从0.01到1000兆电子伏特。我们发现，在由几个终态粒子组成的系统中，窄共振对衰变概率的贡献与其宽度成正比。然而，它从不超过在忽略共振贡献的自由终态粒子上计算的衰变概率值。

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Does the Existence of the f0 Meson Increase the K+ → π0π0π0e+ν Decay Probability?

We estimate a possible contribution of the two-pion system \({{f}_{0}}(500)\) wide resonance to the decay probability of the super rare decay \({{K}^{ + }} \to 3{{\pi }^{0}}{{e}^{ + }}\nu \). We vary the width of the resonance from 0.01 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.

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来源期刊

JETP Letters 物理-物理：综合

CiteScore

2.40

自引率

30.80%

发文量

164

审稿时长

3-6 weeks

期刊介绍： All topics of experimental and theoretical physics including gravitation, field theory, elementary particles and nuclei, plasma, nonlinear phenomena, condensed matter, superconductivity, superfluidity, lasers, and surfaces.