Volume 318 - Corfu Summer Institute 2017 "Schools and Workshops on Elementary Particle Physics and Gravity" (CORFU2017) - Workshop on Testing Fundamental Physics Principles
Anomalous gauge-U(1), ’t Hooft mechanism, and “invisible” QCD axion from string
J.E. Kim
Full text: pdf
Pre-published on: August 22, 2018
Published on: August 24, 2018
Abstract
We are players in a theory theater. A play we show here is the 't Hooft mechanism: if a gauge symmetry and a global symmetry are broken by one complex scalar field by the Higgs mechanism then there survives a global symmetry below the breaking scale.
In the string compactification, it is realized when an anomalous gauge U(1) symmetry is created. This is a good example of obtaining a
global PQ symmetry at an intermediate scale, realizing an invisible'' axion with mass around $10^{-4}$ eV for a cold dark matter candidate.
DOI: https://doi.org/10.22323/1.318.0202
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