Axionic excitation from QCD Condensate

Abstract

A complex order parameter is used for describing inhomogeneous quark condensate and its phase is decomposed into a regular part and a singular part. An emergent gauge symmetry is found to connect these two parts. The singular part plays the role of an emergent gauge field while the regular part can be considered as an axionic excitation, provided that the chromoelectric flux tube is capable of inducing a vortex configuration in the quark condensate, with the help of axial anomaly.

4 pages, double-column, no figures

References in corpus (9)

• The Chiral Magnetic Effect
• Hadronic molecules
• Measurement of the permanent electric dipole moment of the neutron
• Some Features of the Glasma
• Inhomogeneous chiral condensates
• Quark confinement: dual superconductor picture based on a non-Abelian Stokes theorem and reformulations of Yang-Mills theory
• Ordinary and Extraordinary Hadrons
• Relativistic superfluidity and vorticity from the nonlinear Klein-Gordon equation
• QCD strings and the U(1) problem