N China Elect Power Univ, Dept Appl Phys, Baoding 071003, Peoples R China
; Hebei Teachers Univ, Dept Phys, Shijiazhuang 050016, Peoples R China
; Chinese Acad Sci, Inst High Energy Phys, Beijing 100039, Peoples R China
; Natl Lab Heavy Ion Accelerator, Ctr Theoret Nucl Phys, Lanzhou 730000, Peoples R China
; China Ctr Adv Sci & Technol, World Lab, Beijing 100080, Peoples R China
Based on the factorization theorem for lepton induced hard diffractive scattering and color octet heavy quarkonium production mechanism, eta(c), diffractive production in the direct photon process is studied. The results show that this process can be measured at DESY HERA, and eta(c), production has different features from J/psi production, which is weakly affected by the initial and final state gluon radiation. Therefore, eta(c) photoproduction can be viewed as reliable estimate. The experimental study of this process can give valuable insight in the color octet heavy quarkonium production mechanism.