| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1852813 | Physics Letters B | 2015 | 5 Pages |
Abstract
A search for the process e+e−→η′(958)e+e−→η′(958) in the π+π−η→π+π−γγπ+π−η→π+π−γγ final state has been performed with the CMD-3 detector at the VEPP-2000 e+e−e+e− collider. Using an integrated luminosity of 2.69 pb−12.69 pb−1 collected at the center-of-mass energy Ec.m.=957.68 MeVEc.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 eVΓη′(958)→e+e−⋅Bη′(958)→π+π−η⋅Bη→γγ<0.00041 eV at 90% C.L.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Nuclear and High Energy Physics
Authors
R.R. Akhmetshin, A.V. Anisenkov, V.M. Aulchenko, V.Sh. Banzarov, N.S. Bashtovoy, D.E. Berkaev, 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,