On the strong-CP problem and its axion solution in torsionful theories

Abstract

Gravitational effects may interfere with the axion solution to the strong-CP problem. We point out that gravity can potentially provide a protection mechanism against itself, in the form of an additional axion-like field associated with torsion.

arXiv comment7 pages, no figures

References in corpus (12)

• Small neutrino masses from gravitational $\theta$-term
• Interaction of the Barbero--Immirzi Field with Matter and Pseudo-Scalar Perturbations
• Peccei--Quinn mechanism in gravity and the nature of the Barbero--Immirzi parameter
• (Re-)Inventing the Relativistic Wheel: Gravity, Cosets, and Spinning Objects
• Three-Form Gauging of axion Symmetries and Gravity
• Axions in gravity with torsion
• On How Neutrino Protects the Axion
• A solution of the strong CP problem via the Peccei-Quinn mechanism through the Nieh-Yan modified gravity and cosmological implications
• Weyl and Ricci gauging from the coset construction
• Gauging nonrelativistic field theories using the coset construction
• Domestic Axion
• Topological Origin of Chiral Symmetry Breaking in QCD and in Gravity

Cited by in corpus (4)

• Static and rotating black strings in dynamical Chern-Simons modified gravity
• Non-zero torsion and late cosmology
• Torsion-induced gravitational $\theta$ term and gravitoelectromagnetism
• Luminal Propagation of Gravitational Waves in Scalar-tensor Theories: The Case for Torsion