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

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.

4 pages, 3 figures, talk presented at QCD05 (Montpellier) 4-9 July

References in corpus (4)

• The U_A(1) Problem on the Lattice with Ginsparg-Wilson Fermions
• Spontaneous Parity Violation in QCD At Finite Temperature: On the Inapplicability of the Vafa-Witten Theorem
• Analyticity in theta on the lattice and the large volume limit of the topological susceptibility
• Vacuum energy and $\theta$--vacuum

Cited by in corpus (3)

• The neutron and its role in cosmology and particle physics
• Neutron electric dipole moment using $N_f=2+1+1$ twisted mass fermions
• A Fresh Look into the Neutron EDM and Magnetic Susceptibility