Unpolarized and polarized structure functions and spin tests at supercollider energies.

Abstract

We present a simple analytic parametrization for quark and gluon distributions inside a polarized or unpolarized proton. It is valid for small enough x and for very large ${Q}^{2}$, the kinematic domain relevant for supercollider energies. We calculate some helicity hadron asymmetries in polarized-hadron collisions in the multi-TeV energy range and we discuss further possibilities of significant spin effects.