Neutron electric dipole moment: Constituent dressing and compositeness

2001/01/31 by M. B. Hecht, Craig D. Roberts, C. D. Roberts +2 · 23 citations
Physics and Astronomy · #Atomic and Subatomic Physics Research #CP violation #Dipole #Electric dipole moment #Higgs boson #Neutron #Neutron electric dipole moment #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Quark #hep-ex #hep-ph #nucl-ex #nucl-th

paper · pdf · doi:10.1103/physrevc.64.025204

published in Physical Review C 64(2) (American Institute of Physics) · 9 pages, LaTeX2e. Errors in Table 1 corrected; five references added. To appear in Phys. Rev. C

arxiv created 2001/05/31 · openalex publication_date 2001/07/25 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

Contributions to the neutron's electric dipole moment (EDM), d_n, are calculated using a well-constrained ansatz for the nucleon's Poincar'e covariant Fadde'ev amplitude. The momentum-dependent quark dressing amplifies the contribution from the current-quarks' EDMs; and dressed-quark confinement and binding make distinguishable the effect of the two CP and T violating interactions: i\ensuremathγ₅\ensuremathσ_\ensuremathμ\ensuremathν(p₁\ensuremath-p₂)_\ensuremathν and \ensuremathγ₅(p₁+p₂)_\ensuremathμ, where p_1,2 are the current-quarks' momenta. The value of |d_n| obtained using the current-quark EDMs generated by a minimal three Higgs doublet model of spontaneous CP violation is close to the current experimental upper bound.

Citations

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• Dyson–Schwinger Equations: A Tool for Hadron Physics