A Lighter QCD Axion from Anarchy
High Energy Physics - Phenomenology
2023-08-15 v2
Abstract
We introduce the Anarchic Axion, a class of axion models which solves the Strong CP problem within current nEDM constraints with a lighter than usual QCD axion, thus populating new parameter space that ongoing and future experiments target. The Anarchic Axion is driven light by a soft breaking of the Peccei-Quinn symmetry, which also predicts a residual neutron electric dipole moment. We introduce a novel measure to quantify the tuning required for large deviations from the usual QCD axion band. In addition to motivating searches for unusually light axions, this work establishes a new target for axion effective field theory.
Keywords
Cite
@article{arxiv.2301.08760,
title = {A Lighter QCD Axion from Anarchy},
author = {Fatemeh Elahi and Gilly Elor and Alexey Kivel and Julien Laux and Saereh Najjari and Felix Yu},
journal= {arXiv preprint arXiv:2301.08760},
year = {2023}
}
Comments
5+2 pages. 3 figures. 1 table. v2: minor comments added, version published in Phys. Rev. D Letters