Finite-volume corrections to the CP-odd nucleon matrix elements of the electromagnetic current from the QCD vacuum angle

Abstract

Nucleon electric dipole moments originating from strong CP-violation are being calculated by several groups using lattice QCD. We revisit the finite volume corrections to the CP-odd nucleon matrix elements of the electromagnetic current, which can be related to the electric dipole moments in the continuum, in the framework of chiral perturbation theory up to next-to-leading order taking into account the breaking of Lorentz symmetry. A chiral extrapolation of the recent lattice results of both the neutron and proton electric dipole moments is performed, which results in $d_n=(-2.7\pm 1.2)\times 10^{-16}e{\theta }_0$cm and $d_p=(2.1\pm 1.2)\times 10^{-16}e{\theta }_0$cm.

12 pages, 3 figures. A longer title, no change in the text. Accepted for publication in PLB

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Cited by in corpus (4)

• P- and T-Violating Lagrangians in Chiral Effective Field Theory and Nuclear Electric Dipole Moments
• Linear programming analysis of the $R$-parity violation within EDM-constraints
• Permanent Electric Dipole Moments of Single-, Two-, and Three-Nucleon Systems
• A unified formulation of one-loop tensor integrals for finite volume effects