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arXiv · 2308.11251

Twist-3 Contributions in Semi-Inclusive DIS in the Target Fragmentation Region

K. B. Chen·J. P. Ma·X. B. Tong
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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.

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K. B. Chen, J. P. Ma, X. B. Tong. 2023-08-22. Twist-3 Contributions in Semi-Inclusive DIS in the Target Fragmentation Region. https://doi.org/10.1103/physrevd.108.094015

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