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

A search for the process e+e−→η′(958) in the π+π−η→π+π−γγ 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 Ec.m.=957.68 MeV we set an upper limit for the product of electronic width and branching fractions Γη′(958)→e+e−⋅Bη′(958)→π+π−η⋅Bη→γγ<0.00041 eV at 90% C.L.

Note:

12 pages, 5 figures, submitted to Physics Letters B

Novosibirsk VEPP-2000
branching ratio: upper limit
electron positron: annihilation
eta(958): electroproduction
eta(958): hadronic decay
eta(958): width
CMD
experimental results
electron positron --> eta(958)
eta(958) --> eta pi+ pi-

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