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A Search for $η'_c$ Production in Photon-Photon Fusion at LEP

P. Abreu
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Abstract

A search for the production of the $η'_c$ meson, the first radial excitation of the ground state of charmonium $η_c$(2980), in the photon-photon fusion reaction at LEP has been performed using the data collected by the DELPHI detector during 1992-1996. No evidence of $η'_c$ production is found in the mass region 3520--3800 MeV/c^2. An upper limit for the ratio of the two-photon widths of the $η'_c$ and $η_c$ is obtained.

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P. Abreu. 1998-10-14. A Search for $η'_c$ Production in Photon-Photon Fusion at LEP. https://arxiv.org/abs/hep-ex/9810030

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