The production of η′c in two-photon γγ fusion reaction at CLEO was investigated. The spin dependence of Cornell potential along with spin-orbit, spin-spin and tensor components was assumed to occur from the vector Coulombic part. The confinement potential was assumed to be scalar with minimal spin-orbit contribution which was observed due to Thomas precession. The production via two-photon fusion and four-charged particles was ensured by total transverse momentum.
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We gratefully acknowledge the effort of the CESR staff in providing us with excellent luminosity and running conditions. This work was supported by the National Science Foundation, the U.S. Department of Energy, the Research Corporation, and the Texas Advanced Research Program.