Measurement of the f1(1285) → π+π−π0 decay

被引：0
|
作者：
V. Dorofeev
A. Ekimov
Yu. Gouz
A. Ivashin
I. Kachaev
A. Karyukhin
Yu. Khokhlov
V. Konstantinov
V. Matveev
V. Nikolaenko
B. Polyakov
D. Ryabchikov
N. Shalanda
M. Soldatov
A. A. Solodkov
A. V. Solodkov
O. Solovianov
A. Zaitsev
机构：
[1] Institute for High Energy Physics,
[2] Moscow Institute of Physics and Technology,undefined
来源：
The European Physical Journal A | 2011年 / 47卷
关键词：
Decay Chain; Detector Resolution; Spectrum Ratio; Universal Scale; Explicit Substitution;
D O I：
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中图分类号：
学科分类号：
摘要：
The isospin symmetry-breaking (ISB) decay f1(1285) → π+π−π0 has been studied at the VES facility. The branching ratio is measured: \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$\frac{{BR\left( {f_1 \to \pi ^ + \pi ^ - \pi ^0 } \right)}} {{BR\left( {f_1 \to \eta \pi ^ + \pi ^ - } \right)}} = 0.86 \pm 0.16_{ - 0.20}^{ + 0.70} \%$\end{document} . An upper limit for the f1 decay into ρ(770)π is obtained: BR(f1(1285) → ρ+−π−+) < 0.31% at 95% CL.
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