TL;DR
Recent advances in lattice QCD have improved the calculation of nucleon structure, achieving better agreement with experiments and addressing previous systematic challenges, including disconnected contributions.
Contribution
This paper reviews recent progress in lattice QCD methods and results for nucleon structure, highlighting improved accuracy and understanding of systematic errors.
Findings
Agreement with experimental measurements for key observables
Enhanced understanding of systematic errors in lattice calculations
Progress in calculating disconnected contributions
Abstract
Recent progress in lattice QCD calculations of nucleon structure will be presented. Calculations of nucleon matrix elements and form factors have long been difficult to reconcile with experiment, but with advances in both methodology and computing resources, this situation is improving. Some calculations have produced agreement with experiment for key observables such as the axial charge and electromagnetic form factors, and the improved understanding of systematic errors will help to increase confidence in predictions of unmeasured quantities. The long-omitted disconnected contributions are now seeing considerable attention and some recent calculations of them will be discussed.
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