Volume 481 - 9th Symposium on Prospects in the Physics of Discrete Symmetries (DISCRETE2024) - Neutrinos and ALPs 1
Non-vanilla Axion Solutions to the Strong CP Problem
F. Yu
Full text: pdf
Published on: April 10, 2025
Abstract
I review recent advances in model-building new solutions to
the strong CP problem. The new models can either enhance the axion
mass by small-size instanton effects or cancel the axion mass
mechanism by soft-breaking terms of the Peccei-Quinn symmetry. Such
models predict an axion discovery that lies outside the vanilla QCD
axion band in the $m_a$ vs.~$F_a$ plane relevant for a wide range of
haloscope, helioscope, microwave cavity, and quantum sensor
experiments.
DOI: https://doi.org/10.22323/1.481.0043
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