QCD Factorization for Semi-Inclusive Deep-Inelastic Scattering at Low Transverse Momentum

Details QCD Factorization for Semi-Inclusive Deep-Inelastic Scattering at Low Transverse Momentum QCD Factorization for Semi-Inclusive Deep-Inelastic Scattering at Low Transverse Momentum

2004-04-21

arxiv.org/abs/hep-ph/0404183v1

Phys.Rev.D71:034005,2005

Physics

High Energy Physics

High Energy Physics - Phenomenology

28 pages, figures included

Scientific paper

10.1103/PhysRevD.71.034005

We demonstrate a factorization formula for semi-inclusive deep-inelastic scattering with hadrons in the current fragmentation region detected at low transverse momentum. To facilitate the factorization, we introduce the transverse-momentum dependent parton distributions and fragmentation functions with gauge links slightly off the light-cone, and with soft-gluon radiations subtracted. We verify the factorization to one-loop order in perturbative quantum chromodynamics and argue that it is valid to all orders in perturbation theory.

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