Transverse momentum effects and angular energy flow in leptoproduction

We show that with the inclusion of soft gluon emission the experimental psub(t) spectra of leptoproduced hadrons are well reproduced without having an unphysically large primordial transverse momentum. A way to distinguish experimentally between primordial and soft gluon effects is given. We further show that the forward-backward asymmetry in the hadronic energy flow predicted by perturbative QCD is, at presently available energies, difficult to observe in the final state of observable particles due to the fragmentation of the jets. The decay of unstable particles produces an energy flow at large angles which washes out the QCD parton level asymmetry. Kinematical effects from the production of a baryon in the target fragmentation jet will, however, give rise to a forward-backward asymmetry that is larger than the QCD asymmetry at present energies. (orig.)