Study of the process $e^+e^-\to\eta\gamma$ in the center-of-mass energy range 1.07--2.00 GeV

arxiv: 1312.7078 · v1 · pith:LJE66N5Wnew · submitted 2013-12-26 · ✦ hep-ex · hep-ph

Study of the process e^+e^-toηγ in the center-of-mass energy range 1.07--2.00 GeV

M. N. Achasov , V. M. Aulchenko , A. Yu. Barnyakov , K. I. Beloborodov , A. V. Berdyugin , A. G. Bogdanchikov , A. A. Botov , T. V. Dimova

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V. P. Druzhinin V. B. Golubev K. A. Grevtsov L. V. Kardapoltsev A. G. Kharlamov D. P. Kovrizhin I. A. Koop A. A. Korol S. V. Koshuba A. P. Lysenko K. A. Martin A. E. Obrazovsky E. V. Pakhtusova E. A. Perevedentsev A. L. Romanov S. I. Serednyakov Z. K. Silagadze A. N. Skrinsky I. K. Surin Yu. A. Tikhonov A. V. Vasiljev P. Yu. Shatunov Yu. M. Shatunov D. A. Shtol

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classification ✦ hep-ex hep-ph

keywords gammacenter-of-masscrossenergymeasuredrangesectionanalysis

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The $e^+e^-\to\eta\gamma$ cross section has been measured in the center-of-mass energy range 1.07--2.00 GeV using the decay mode $\eta\to 3\pi^0$, $\pi^0\to \gamma\gamma$. The analysis is based on 36 pb$^{-1}$ of integrated luminosity collected with the SND detector at the VEPP-2000 $e^+e^-$ collider. The measured cross section of about 35 pb at 1.5 GeV is explained by decays of the $\rho(1450)$ and $\phi(1680)$ resonances.

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Study of the process e^+e^-toηγ in the center-of-mass energy range 1.07--2.00 GeV

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