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

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

2007-12-15

arxiv.org/abs/0712.2512v1

Physics

High Energy Physics

High Energy Physics - Experiment

10 pages, 8 figures, presented at XII Conference on Hadron Spectroscopy

Scientific paper

10.1140/epja/i2008-10664-8

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

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