Search for ξ(2.2) andX(2.2) in radiative decays of ϒ-meson

Authors :: Baru, S. E.
Beilin, M. V.
Blinov, A. E.
Blinov, V. E.
Bondar, A. E.
Bukin, A. D.
Eidelman, Yu. I.
Groshev, V. R.
Kiselev, V. A.
Klimenko, S. G.
Mishnev, S. I.
Onuchin, A. P.
Panin, V. S.
Petrov, V. V.
Protopopov, I. Ya.
Shamov, A. G.
Sidorov, V. A.
Skovpen, Yu. I.
Skrinsky, A. N.
Tayursky, V. A.
Telnov, V. I.
Temnykh, A. B.
Tikhonov, Yu. A.
Tumaikin, G. M.
Undrus, A. E.
Vorobiov, A. I.
Zhilich, V. N.
Zholents, A. A.
Source :: Zeitschrift für Physik C Particles and Fields; December 1989, Vol. 42 Issue: 4 p505-510, 6p
Publication Year :: 1989
Abstract: The results of an experiment on the search for ξ(2.2) andX(2.2) in the radiative decays of the Υ-meson are presented. The experiment was carried out with the MD-1 detector at the VEPP-4 collider. An upper limitB(Υ→γξ)B(ξ→K<superscript>+</superscript>K<superscript>−</superscript>)<2·10<superscript>−4</superscript> is obtained at 90% C.L. Results are presented on the search for the decay Υ→γX, X→ ϕϕ not previously investigated. For this decay the upper limitB(Υ→γX)B(X→ϕϕ)<3·10<superscript>−3</superscript> is obtained at 90% C.L.