A $\nu$ Solution to the Strong CP Problem

Abstract

We present a new solution to the strong CP problem in which the imaginary component of the up quark mass, $\mathcal{I}[m_u]$, acquires a tiny, but non-vanishing value. This is achieved via a Dirac seesaw mechanism, which is also responsible for the generation of the small neutrino masses. Consistency with the observed value of the up quark mass is achieved via instanton contributions arising from QCD-like interactions. In this framework, the value of the neutron electric dipole moment is directly related to $\mathcal{I}[m_u]$, which, due to its common origin with the neutrino masses, implies that the neutron electric dipole moment is likely to be measured in the next round of experiments. We also present a supersymmetric extension of this Dirac seesaw model to stabilize the hierarchy among the scalar mass scales involved in this new mechanism.

5 pages, 2 figures

References in corpus (19)

• An Improved Experimental Limit on the Electric Dipole Moment of the Neutron
• A Revised Experimental Upper Limit on the Electric Dipole Moment of the Neutron
• Renormalization-Group-Improved Effective Potential for the MSSM Higgs Sector with Explicit CP Violation
• Electric Dipole Moments in the MSSM Reloaded
• Theta-Induced Electric Dipole Moment of the Neutron via QCD Sum Rules
• Up-, down-, strange-, charm-, and bottom-quark masses from four-flavor lattice QCD
• Theta Vacua, QCD Sum Rules, and the Neutron Electric Dipole Moment
• Dirac Neutrinos and Dark Matter Stability from Lepton Quarticity
• Neutrino Mass and Baryon Asymmetry from Dirac Seesaw
• Seesaw roadmap to neutrino mass and dark matter
• Performance of the upgraded ultracold neutron source at Los Alamos National Laboratory and its implication for a possible neutron electric dipole moment experiment
• Gauge-Mediated Supersymmetry Breaking: Introduction, Review and Update
• A Flavorful Factoring of the Strong CP Problem
• Flavour-symmetric type-II Dirac neutrino seesaw mechanism
• Instanton Effects in Three Flavor QCD
• Indirect Signs of the Peccei-Quinn Mechanism
• Cryogenic magnetic coil and superconducting magnetic shield for neutron electric dipole moment searches
• How the minuscule can contribute to the big picture: the neutron electric dipole moment project at TRIUMF
• Strong CP, Up-Quark Mass, and the Randall-Sundrum Microscope

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• Consequences of vector-like quarks of Nelson-Barr type
• Dirac neutrinos from Peccei-Quinn symmetry: two examples
• The Type II Dirac Seesaw Portal to the mirror sector: Connecting neutrino masses and a solution to the strong CP problem