Double J/ψProduction at Photon Colliders
Cong-Feng Qiao
Abstract
The double J/ψ(DJ) production in direct photon-photon collision is investigated. It is found that the J/ψproduction rate in this process is of the same order of magnitude as those of previously discussed ones, which hints the dominant J/ψinclusive production process in the direct photon-photon collision is still not being touched. As DJ production process has a clear distinction from the single J/ψinclusive processes in the final states, experimental study on it would be helpful to clarify the validity of color-singlet model.
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