The landscape of QCD axion models

L Di Luzio, M Giannotti, E Nardi, L Visinelli - Physics Reports, 2020 - Elsevier
We review the landscape of QCD axion models. Theoretical constructions that extend the
window for the axion mass and couplings beyond conventional regions are highlighted and …

Grand unified theories and proton decay

P Langacker - Physics Reports, 1981 - Elsevier
Grand unified theories, in which the strong and electroweak interactions are embedded into
an underlying theory with a single gauge coupling constant, are reviewed. A detailed …

Weak-Interaction Singlet and Strong Invariance

JE Kim - Physical Review Letters, 1979 - APS
Weak-Interaction Singlet and Strong CP Invariance Page 1 Vol.UMz 4), NUMBER 2 PHYSICAL
REVIEW LETTERS 9 JUz, Y 1979 J.V. Noble, Phys.Rev. C 17, 2151 (1978). 5J. V. Noble …

Axions in string theory

P Svrcek, E Witten - Journal of High Energy Physics, 2006 - iopscience.iop.org
In the context of string theory, axions appear to provide the most plausible solution of the
strong CP problem. However, as has been known for a long time, in many string-based …

Light pseudoscalars, particle physics and cosmology

JE Kim - Physics Reports, 1987 - Elsevier
We review physics of light pseudoscalars (axions, majorons and familons) and their effects
in cosmology. The axions which solve the strong CP problem play important roles in …

Axions and the strong problem

JE Kim, G Carosi - Reviews of Modern Physics, 2010 - APS
Current upper bounds on the neutron electric dipole moment constrain the physically
observable quantum chromodynamic (QCD) vacuum angle| θ¯|≲ 10− 11. Since QCD …

Chiral estimate of the electric dipole moment of the neutron in quantum chromodynamics

RJ Crewther, P Di Vecchia, G Veneziano, E Witten - Physics Letters B, 1979 - Elsevier
Current algebra for CP violating strong interactions is investigated. In particular, the neutron
electric dipole moment Dn is shown to behave as θmπ21nmπ2 for small pion mass mπ and …

Electric dipole moments as probes of new physics

M Pospelov, A Ritz - Annals of physics, 2005 - Elsevier
We review several aspects of flavour-diagonal CP-violation, focussing on the role played by
the electric dipole moments (EDMs) of leptons, nucleons, atoms, and molecules, which …

Flavor structures of charged fermions and massive neutrinos

Z **ng - Physics Reports, 2020 - Elsevier
Most of the free parameters in the Standard Model (SM)—a quantum field theory which has
successfully elucidated the behaviors of strong, weak and electromagnetic interactions of all …

The Strong CP problem and axions

RD Peccei - Axions: Theory, Cosmology, and Experimental …, 2008 - Springer
I describe how the QCD vacuum structure, necessary to resolve the U (1) _A problem,
predicts the presence of a PabbrevPparity transformation, TabbrevTtime reversal …