Recently, Brodsky, Hwang and Schmidt have proposed a new mechanism that gives a transverse spin symmetry at leading twist in semiinclusive deep-inelastic scattering. I show that the new mechanism isâ€¦ (More)

A detailed proof of hard scattering factorization is given with the inclusion of heavy quark masses. Although the proof is explicitly given for deep-inelastic scattering, the methods apply moreâ€¦ (More)

Universality in QCD factorization of parton densities, fragmentation functions, and soft factors is endangered by the process dependence of the directions of Wilson lines in their definitions. Weâ€¦ (More)

We show how the transverse polarization of a quark initiating a jet can be probed by the azimuthal distribution of two hadrons (of large z) in the jet. This permits a twist 2 asymmetry in hardâ€¦ (More)

A proof is given that hard-scattering factorization is valid for deep-inelastic processes which are diffractive or which have some other condition imposed on the final state in the targetâ€¦ (More)

We formulate and prove a QCD factorization theorem for hard exclusive electroproduction of mesons in QCD. The proof is valid for the leading power in Q and all logarithms. This generalizes previousâ€¦ (More)

We discuss a factorization approach to constructing next-to-leading-order (NLO) Monte Carlo event generators for high energy hadron collisions. We explain how a subtractive technique based onâ€¦ (More)