An upper limit to the electric dipole moment of the neutron from lattice QCD

2005/10/11 by B. Allés, B. Alles, Massimo D’Elia +2
Physics and Astronomy · #Atomic and Subatomic Physics Research #Quantum Chromodynamics and Particle Interactions #Quantum, superfluid, helium dynamics #hep-lat

paper · pdf · doi:10.1016/j.nuclphysbps.2006.11.059

published as Nucl.Phys.Proc.Suppl.164:256-259,2007 · 4 pages, 3 figures, talk presented at QCD05 (Montpellier) 4-9 July

arxiv created 2005/10/11 · openalex publication_date 2007/01/19 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

A linear increase with the volume of the topological susceptibility can signal spontaneous breaking of parity and time inversion, due to a nonzero vacuum expectation value of the topological charge. Such a breaking would produce a nonzero electric dipole moment of the neutron, d_n. An upper limit to d_n is derived from numerical simulations at increasing volumes.

Citations

• Parity Conservation in Quantum Chromodynamics
• New Experimental Limit on the Electric Dipole Moment of the Neutron