Transverse momentum-dependent parton distributions for longitudinally polarized nucleons from domain wall fermion calculations at the physical pion mass

Conference · Sun Jan 01 04:00:00 EST 2023 · Proceedings of The 39th International Symposium on Lattice Field Theory — PoS(LATTICE2022)

DOI:https://doi.org/10.22323/1.430.0103· OSTI ID:1959014

Engelhardt, Michael; Hasan, Nesreen; Izubuchi, Taku; Kallidonis, Christos; Krieg, Stefan; Meinel, Stefan; Negele, John; Pochinsky, Andrew; Silvi, Giorgio; Syritsyn, Sergey

Previous Lattice QCD calculations of nucleon transverse momentum-dependent parton distribu?tions (TMDs) focused on the case of transversely polarized nucleons, and thus did not encompass two leading-twist TMDs associated with longitudinal polarization, namely, the helicity TMD and the worm-gear TMD corresponding to transversely polarized quarks in a longitudinally polarized nucleon. Based on a definition of TMDs via hadronic matrix elements of quark bilocal operators containing staple-shaped gauge connections, TMD observables characterizing the aforementioned two TMDs are evaluated, utilizing an RBC/UKQCD domain wall fermion ensemble at the physical pion mass.

• Research Organization: Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Nuclear Physics (NP)
• DOE Contract Number: SC0009913; SC0023116; AC02-05CH11231
• OSTI ID: 1959014
• Report Number(s): JLAB-THY-23-3757; arXiv:2301.06118; DOE/OR/23177-5768
• Conference Information: Journal Name: Proceedings of The 39th International Symposium on Lattice Field Theory — PoS(LATTICE2022) Journal Volume: 430
• Country of Publication: United States
• Language: English