COLOR OCTET CONTRIBUTION TO J PSI PRODUCTION AT A PHOTON LINEAR COLLIDER/

We investigate J/psi, production at a Photon Linear Collider (PLC) in the framework of NRQCD factorization approach. It was shown that color octet contribution is dominating in charmonium production at PLC. The main fraction of J/psi comes from the single and double resolved phot on processes. Expected cross sections of charmonium states production are large enough even at p(T)> 5 GeV to expect several hundreds of J/p si's through the leptonic decays channel for a projected integral PLC luminosity of 50 fb(-1). (C) 1998 Elsevier Science B.V. All rights res erved.