Twist-3 Contributions in Semi-Inclusive DIS with Transversely Polarized Target
A.P. Chen, J.P. Ma, G.P. Zhang
TL;DR
This paper analyzes twist-3 contributions in semi-inclusive deep inelastic scattering with a transversely polarized target, deriving key results at leading order and proposing observables to extract various distribution functions.
Contribution
It provides the complete twist-3 contribution calculations within collinear factorization and constructs experimental observables for their measurement.
Findings
Derived the full twist-3 contributions to the hadronic tensor.
Proposed observables to extract twist-2 and twist-3 distributions.
Compared collinear and transverse-momentum-dependent factorization approaches.
Abstract
We study semi-inclusive DIS with a transversely polarized target in the approach of collinear factorization. The effects related with the transverse polarization are at twist-3. We derive the complete result of twist-3 contributions to the relevant hadronic tensor at leading order of , and construct correspondingly experimental observables. Measuring these observables will help to extract the twist-2 transversity distribution, twist-3 distributions and twist-3 fragmentation functions of the produced unpolarized hadron. A detailed comparison with the approach of transverse-momentum-dependent factorization is made.
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