Deep inelastic leptoproduction of spin-one hadrons

In this paper we analyze deep inelastic one-particle inclusive processes for the case of spin-one targets or for the case of spin-one produced hadrons, such as $\rho$ mesons. This allows the measurement of new distribution and fragmentation functions not available in the spin-half case, and provides new ways to probe functions otherwise difficult to measure. We will analyze only contributions leading order in $1/Q,$ but we will include effects of the transverse momentum of partons. We also include time-reversal odd functions.