A lattice QCD study of nucleon structure with physical quark masses / von M.Sc. Nasreen Hasan. 2019
Inhalt
- Introduction: Nucleon structure
- Nucleon structure on the lattice
- Nucleon field
- Nucleon correlation functions
- Smearing of quark fields
- Computation of matrix elements
- Nucleon form factors and radii
- Renormalization in lattice QCD
- Nucleon axial, scalar, and tensor charges
- Lattice setup
- Estimation of bare charges
- Nonperturbative renormalization
- Renormalized charges
- Summary and outlook
- Computing the nucleon charge and axial radii directly at Q2=0
- The derivative method
- Momentum derivatives of quark propagator
- Flavor structure of correlators constructed from propagator derivatives
- Momentum derivatives of correlation functions
- Momentum derivatives of matrix elements
- Results
- Summary and outlook
- Up, down, and strange nucleon axial form factors
- Lattice methodology
- Lattice ensemble and calculation setup
- Effectiveness of hierarchical probing
- Excited-state effects
- Form factor fits using the z expansion
- Renormalization
- Vector current renormalization
- Study of discretization effects
- Matching to MS and running of the singlet axial current
- Renormalization of the axial current: Nf = 2+1
- Volume-source approach and reuse of disconnected diagrams
- Results
- Axial form factors
- Discussion and conclusions
- Summary