Twist-3 Contributions in Semi-Inclusive DIS in the Target Fragmentation Region
arXiv:2308.11251 · doi:10.1103/PhysRevD.108.094015
Abstract
We present the complete results up to twist-3 for hadron production in the target fragmentation region of semi-inclusive deep inelastic scattering with a polarized lepton beam and polarized nucleon target. The nonperturbative effects are factorized into fracture functions. The calculation up to twist-3 is nontrivial since one has to keep gauge invariance. By applying collinear expansion, we show that the hadronic tensor can be expressed by gauge-invariant fracture functions. We also present the results for the structure functions and azimuthal asymmetries.
Published version
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