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arXiv · 0712.2512

Search for $f_1(1285) \to π^+π^-π^0$ decay with VES detector

V. Dorofeev·R. Dzheliadin·A. Ekimov·Yu. Gavrilov·Yu. Gouz·A. Ivashin·V. Kabachenko·I. Kachaev·A. Karyukhin·Yu. Khokhlov·V. Konstantinov·M. Makouski·V. Matveev·A. Myagkov·V. Nikolaenko·A. Ostankov·B. Polyakov·D. Ryabchikov·N. Shalanda·M. Soldatov·A. A. Solodkov·A. V. Solodkov·O. Solovianov·A. Zaitsev
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Abstract

The isospin violating decay $f_1(1285)\toπ^+π^-π^0$ has been studied at VES facility. This study is based at the statistics acquired in $π^- Be$ interactions at 27, 36.6 and 41 GeV/c in diffractive reaction $π^- N \to (f_1 π^-) N$. The $f_1(1285) \to π^+π^-π^0$ decay is observed. The ratio of decay probabilities $BR(f_1(1285) \to π^+π^-π^0)$ to $BR(f_1(1285) \to ηπ^+π^-) \cdot BR(η\to γγ)$ is $\sim\:1.4%$.

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V. Dorofeev, R. Dzheliadin, A. Ekimov, Yu. Gavrilov, Yu. Gouz, A. Ivashin, V. Kabachenko, I. Kachaev, A. Karyukhin, Yu. Khokhlov, V. Konstantinov, M. Makouski, V. Matveev, A. Myagkov, V. Nikolaenko, A. Ostankov, B. Polyakov, D. Ryabchikov, N. Shalanda, M. Soldatov, A. A. Solodkov, A. V. Solodkov, O. Solovianov, A. Zaitsev. 2007-12-15. Search for $f_1(1285) \to π^+π^-π^0$ decay with VES detector. https://doi.org/10.1140/epja/i2008-10664-8

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