A Lattice Story of Proton Spin

Abstract

In this contribution, I summarized the recent Lattice QCD consensuses on the quark helicity, plus the investigations on the gluon helicity and orbital angular momenta. The preliminary non-perturbative normalized and renormalized Ji quark and gluon angular momentum results are also reported and compared with the previous 1-loop perturbative renormalized results.

14 pages, 10 figures, Proceedings for the 36th Annual International Symposium on Lattice Field Theory, 22-28 July 2018, Michigan State University, East Lansing, Michigan, USA. References are updated

References in corpus (9)

• Extraction of Spin-Dependent Parton Densities and Their Uncertainties
• A first unbiased global determination of polarized PDFs and their uncertainties
• Evidence for polarization of gluons in the proton
• The nucleon spin and momentum decomposition using lattice QCD simulations
• Do gluons carry half of the nucleon momentum?
• Model independent extraction of the proton magnetic radius from electron scattering
• $N\pi$-state contamination in lattice calculations of the nucleon axial form factors
• The 1-loop correction of the QCD energy momentum tensor with the overlap fermion and HYP smeared Iwasaki gluon
• Proton spin in a light-cone chiral quark model