Further Search for the Two-Photon Production of the Glueball Candidate $f_J(2220)$

Abstract

The CLEOII detector at the Cornell e+ e- storage ring CESR has been used to search for the two-photon production of the $f_J(2220)$ decaying into pi+ pi-. No evidence for a signal is found in data corresponding to an integrated luminosity of 4.77/fb and a 95% CL upper limit on ${\Gamma }_{two-photon}\ast BRpi+pi-$ of 2.5 eV is set. If this result is combined with the BES Collaboration's measurement of $f_J(2220)->pi+pi-$ in radiative $J/\psi$ decay, a 95% CL lower limit on the stickiness of the $f_J(2220)$ of 73 is obtained. If the recent CLEO result for $Γ_{two-photon} * BR{\K_S K_S}$ is combined with the present result, the stickiness of the $f_J(2220)$ is found to be larger than 102 at the 95% CL. These results for the stickiness (the ratio of the probabilities for two-gluon coupling and two-photon coupling) provide further support for a substantial neutral parton content in the $f_J(2220)$.

8 pages, postscript file also available through http://w4.lns.cornell.edu/public/CLNS