Nucleon Electric Dipole Moments and the Isovector Parity- and Time-Reversal-Odd Pion-Nucleon Coupling

Abstract

The isovector time-reversal- and parity-violating pion-nucleon coupling ${\bar{g}}_{\pi }^{(1)}$ is uniquely sensitive to dimension six interactions between right-handed light quarks and the Standard Model Higgs doublet that naturally arises in left-right symmetric models. Recent work has used the ${\bar{g}}_{\pi }^{(1)}$-induced one-loop contribution to the neutron electric dipole moment $d_n$, together with the present experimental $d_n$ bound, to constrain the CP-violating parameters of the left-right symmetric model. We show that this and related analyses are based on an earlier meson theory $d_n$ computation that is not consistent with the power-counting appropriate for an effective field theory. We repeat the one-loop calculation using heavy baryon chiral perturbation theory and find that the resulting $d_n$ sensitivity to ${\bar{g}}_{\pi }^{(1)}$ is suppressed, implying more relaxed constraints on the parameter space of the left-right symmetric model. Assuming no cancellations between this loop contribution and other contributions, such as the leading order EDM low-energy constant, the present limit on $d_n$ implies $|{\bar{g}}_{\pi }^{(1)}|\lesssim 1.1\times 10^{-10}$.

10 pages, 4 figures

References in corpus (11)

• An Improved Experimental Limit on the Electric Dipole Moment of the Neutron
• Improved limit on the permanent electric dipole moment of 199Hg
• Chiral Perturbation Theory and Baryon Properties
• General CP Violation in Minimal Left-Right Symmetric Model and Constraints on the Right-Handed Scale
• Nucleon mass and sigma term from lattice QCD with two light fermion flavors
• Resonance method of electric-dipole-moment measurements in storage rings
• Strong-Isospin Violation in the Neutron-Proton Mass Difference from Fully-Dynamical Lattice QCD and PQQCD
• The Nucleon Electric Dipole Form Factor From Dimension-Six Time-Reversal Violation
• The Electric Dipole Form Factor of the Nucleon in Chiral Perturbation Theory to Sub-leading Order
• Baryon electric dipole moments from strong CP violation
• A Fresh Look into the Neutron EDM and Magnetic Susceptibility

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