Revisiting model relations between T -odd transverse-momentum-dependent parton distributions and generalized parton distributions
Abstract
We revisit the connection between generalized parton distributions in impact parameter space and T-odd effects in single spin asymmetries of the semi-inclusive deep inelastic process. We show that nontrivial relations can be established only under very specific conditions, typically realized only in models that describe hadrons as two-body bound systems and involving a helicity-conserving coupling between the gauge boson and the spectator system. Examples of these models are the scalar-diquark spectator model or the quark-target model for the nucleon, and relativistic models for the pion at the lowest order in the Fock-space expansion.
- Publication:
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Physical Review D
- Pub Date:
- September 2019
- DOI:
- 10.1103/PhysRevD.100.054039
- arXiv:
- arXiv:1907.06960
- Bibcode:
- 2019PhRvD.100e4039P
- Keywords:
-
- High Energy Physics - Phenomenology;
- Nuclear Theory
- E-Print:
- 15 pages, 2 figures, 1 table, v2: list of references has been corrected