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Consistent analysis of $f_1 (1285)$ meson form factors

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arxiv 1909.07938 v2 pith:N6HM3NPK submitted 2019-09-17 hep-ph

classification hep-ph
keywords consistentfactorsformmesonparameterizationanalysisasymptoticavailable
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

Parameterization of the form factors of $f_1 (1285)$ meson is proposed. This parameterization is consistent with the available experimental data on the cross sections of $f_1 (1285)$ meson production in the processes $e^+e^- \to f_1 (1285)$ and $e^+e^- \to e^+e^-f_1 (1285)$, as well as on the widths of the decays $f_1 (1285)\to e^+e^-$, $f_1 (1285)\to \rho^0\gamma$, $f_1 (1285)\to \rho^0\pi^+\pi^-$, and $f_1 (1285)\to 2\pi^+2\pi^-$. Our parameterization is also consistent with the predictions for the asymptotic behavior of these form factors.

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  1. Evidence of the $e^+ e^-\to f_1(1285)$ reaction with the CMD-3 detector at VEPP-2000

    hep-ex 2026-08 conditional novelty 5.0 of 10

    The f1(1285) meson is produced in e+e- collisions and decays to eta pi0 pi0, giving a branching fraction B(f1->e+e-) = (8.3 +- 2.3 +- 1.1)e-9.

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