MEASUREMENT OF INCLUSIVE ELECTRON CROSS-SECTION IN GAMMA-GAMMA COLLISIONS AT TRISTAN

We have studied open charm production in gamma gamma collisions with t he TOPAZ detector at the TRISTAN e(+)e(-) collider. In this study, cha rm quarks were identified by electrons (and positrons) from semi-lepto nic decays of charmed hadrons. The data corresponded to an integrated luminosity of 95.3 pb(-1) at a center-of-mass energy of 58 GeV. The re sults are presented as the cross sections of inclusive electron produc tion in gamma gamma collisions with an anti-tag condition, as well as the subprocess cross sections, which correspond to resolved-photon pro cesses. The latter were measured by using a sub-sample with remnant je ts. A comparison with various theoretical predictions based on direct and resolved-photon processes showed that our data prefer that with re latively large gluon contents in a photon at small x(x less than or eq ual to 0.1), with the next-to-leading order correction, and with a cha rm-quark mass of 1.3 GeV.