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arXiv · 1409.1664

Search for the process $e^+e^-\to η^\prime(958)$ with the CMD-3 detector

R. R. Akhmetshin·A. V. Anisenkov·V. M. Aulchenko·V. Sh. Banzarov·N. S. Bashtovoy·D. E. Berkaeva·A. E. Bondar·A. V. Bragin·S. I. Eidelman·D. A. Epifanov·L. B. Epshteyn·A. L. Erofeev·G. V. Fedotovich·S. E. Gayazov·A. A. Grebenuk·D. N. Grigoriev·E. N. Gromov·F. V. Ignatov·S. V. Karpov·V. F. Kazanin·B. I. Khazin·I. A. Koop·O. A. Kovalenko·A. N. Kozyrev·E. A. Kozyrev·P. P. Krokovny·A. E. Kuzmenko·A. S. Kuzmin·I. B. Logashenko·P. A. Lukin·K. Yu. Mikhailov·N. Yu. Muchnoi·V. S. Okhapkin·Yu. N. Pestov·E. A. Perevedentsev·A. S. Popov·G. P. Razuvaev·Yu. A. Rogovsky·A. L. Romanov·A. A. Ruban·N. M. Ryskulov·A. E. Ryzhenenkov·V. E. Shebalin·D. N. Shemyakin·B. A. Shwartz·D. B. Shwartz·A. L. Sibidanov·P. Yu. Shatunov·Yu. M. Shatunov·E. P. Solodov·V. M. Titova·A. A. Talyshev·A. I. Vorobiov·Yu. V. Yudin
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Abstract

A search for the process $\epem\to η^\prime(958)$ in the $\pipiη\to\pipiγγ$ final state has been performed with the CMD-3 detector at the VEPP-2000 $e^+e^-$ collider. Using an integrated luminosity of 2.69 pb$^{-1}$ collected at the center-of-mass energy \Ecm = 957.68 MeV we set an upper limit for the product of electronic width and branching fractions $Γ_{η^\prime(958)\to\epem}\cdot\BR_{η^\prime(958)\to\pipiη}\cdot\BR_{η\toγγ}<0.00041$ eV at 90\% C.L.

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R. R. Akhmetshin, A. V. Anisenkov, V. M. Aulchenko, V. Sh. Banzarov, N. S. Bashtovoy, D. E. Berkaeva, A. E. Bondar, A. V. Bragin, S. I. Eidelman, D. A. Epifanov, L. B. Epshteyn, A. L. Erofeev, G. V. Fedotovich, S. E. Gayazov, A. A. Grebenuk, D. N. Grigoriev, E. N. Gromov, F. V. Ignatov, S. V. Karpov, V. F. Kazanin, B. I. Khazin, I. A. Koop, O. A. Kovalenko, A. N. Kozyrev, E. A. Kozyrev, P. P. Krokovny, A. E. Kuzmenko, A. S. Kuzmin, I. B. Logashenko, P. A. Lukin, K. Yu. Mikhailov, N. Yu. Muchnoi, V. S. Okhapkin, Yu. N. Pestov, E. A. Perevedentsev, A. S. Popov, G. P. Razuvaev, Yu. A. Rogovsky, A. L. Romanov, A. A. Ruban, N. M. Ryskulov, A. E. Ryzhenenkov, V. E. Shebalin, D. N. Shemyakin, B. A. Shwartz, D. B. Shwartz, A. L. Sibidanov, P. Yu. Shatunov, Yu. M. Shatunov, E. P. Solodov, V. M. Titova, A. A. Talyshev, A. I. Vorobiov, Yu. V. Yudin. 2014-10-27. Search for the process $e^+e^-\to η^\prime(958)$ with the CMD-3 detector. https://doi.org/10.1016/j.physletb.2014.11.056

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