2005/01/01 by E. Shintani, CP-PACS, Collaboration, S. Aoki +13 · 9 citations
Engineering · Physics and Astronomy · #Atomic and Subatomic Physics Research #Dipole #Electric dipole moment #Lattice QCD #Mathematical physics #Neutron electric dipole moment #Nucleon #Parity (physics) #Particle physics #Particle physics theoretical and experimental studies #Physics #Physics of Superconductivity and Magnetism #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quantum electrodynamics #Quantum mechanics #Quark #Renormalization #Superconducting Materials and Applications #hep-lat #hep-ph #nucl-th
paper · pdf · open access · doi:10.1103/physrevd.72.014504
published in Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields 72(1), 128 (American Physical Society) · LaTeX2e, 43 pages, 42 eps figures, uses revtex4 and graphicx, comments added and typos corrected, final version to appear in Phys. Rev. D
openalex publication_date 2005/07/26 · arxiv created 2005/08/01 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We carry out a feasibility study toward a lattice QCD calculation of the neutron electric dipole moment (NEDM) in the presence of the term using two different approaches. In the first method, we calculate the CP-odd electromagnetic form factor F 3 , which becomes the NEDM in the zero momentum transfer limit. At the first order in , we derive a formula connecting the lattice three-point function to the CP-odd electromagnetic form factor. In the second method we directly extract the NEDM from the energy difference between spin-up and spin-down neutron states in the presence of a constant electric field, without expanding a small but non-zero . We test both approaches numerically, employing the domain-wall quark action with the RG improved gauge action in quenched QCD at a 1 2 GeV on a 16 3 32 16 lattice, and further applying the second method to the clover quark action at a similar lattice spacing and nucleon mass. We obtain good signals from both approaches. In particular the second method works well with both fermion formulations.