Twist Three Distribution f_\perp(x,k^\perp) in Light-front Hamiltonian Approach
arXiv:1005.2830 · doi:10.1142/S0217732311036772
Abstract
We calculate the twist three distribution f_\perp(x,k^\perp) contributing to Cahn effect in unpolarized semi-inclusive deep inelastic scattering. We use light-front Hamiltonian technique and take the state to be a dressed quark at one loop in perturbation theory. The 'genuine twist three' contribution comes from the quark-gluon interaction part in the operator and is explicitly calculated. f_\perp(x,k^\perp) is compared with f_1(x,k^\perp).
Two figures added, one author added, some parts rewritten for clarification