ALP contribution to the Strong CP problem

Abstract

We compute the one-loop contribution to the $\bar{\theta }$-parameter of an axion-like particle (ALP) with CP-odd derivative couplings. Its contribution to the neutron electric dipole moment is shown to be orders of magnitude larger than that stemming from the one-loop ALP contributions to the up- and down-quark electric and chromoelectric dipole moments. This strongly improves existing bounds on ALP-fermion CP-odd interactions, and also sets limits on previously unconstrained couplings. The case of a general singlet scalar is analyzed as well. In addition, we explore how the bounds are modified in the presence of a Peccei-Quinn symmetry.

13 pages, 5 tables, 6 figures

References in corpus (36)

• Electric dipole moments as probes of new physics
• Measurement of the permanent electric dipole moment of the neutron
• Model-independent constraints on Delta F=2 operators and the scale of New Physics
• A Revised Experimental Upper Limit on the Electric Dipole Moment of the Neutron
• Reduced Limit on the Permanent Electric Dipole Moment of ${}^{199}$Hg
• ALPs Effective Field Theory and Collider Signatures
• Flaxion: a minimal extension to solve puzzles in the standard model
• Flavor probes of axion-like particles
• The Axiflavon
• Goldstone Bosons as Fractional Cosmic Neutrinos
• Theta-Induced Electric Dipole Moment of the Neutron via QCD Sum Rules
• Neutron EDM from Electric and Chromoelectric Dipole Moments of Quarks
• Running in the ALPs
• Flavor diagonal tensor charges of the nucleon from 2+1+1 flavor lattice QCD
• Flavor constraints on electroweak ALP couplings
• Recent Progress in QCD Condensate Evaluations and Sum Rules
• Invisible Axions and Large-Radius Compactifications
• QCD Corrections to Neutron Electric Dipole Moment from Dimension-six Four-Quark Operators
• Cornering the axion with CP-violating interactions
• Search for solar Kaluza-Klein axions in theories of low-scale quantum gravity
• $\mathbf{C}\mathbf{P}$ violation in Higgs-gauge interactions: from tabletop experiments to the LHC
• Baryon electric dipole moments from strong CP violation
• Axion model in extra dimensions with TeV scale gravity
• A New Cryogenic Apparatus to Search for the Neutron Electric Dipole Moment
• Hunting for CP-violating axionlike particle interactions
• Improved bounds on heavy quark electric dipole moments
• CP-violating axion interactions in effective field theory
• The Chiral Lagrangian of CP-Violating Axion-Like Particles
• Nucleon Electric Dipole Moments in High-Scale Supersymmetric Models
• The Axion-Higgs Portal
• The shift-invariant orders of an ALP
• Improved indirect limits on charm and bottom quark EDMs
• Running beyond ALPs: shift-breaking and CP-violating effects
• Closer look at the matching condition for radiative QCD $\theta$ parameter
• Perturbative running of the topological angles
• CP-violating axion interactions II: axions as Dark Matter

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