Jul 26 – 30, 2021
Europe/Berlin timezone

Quality tests for the Heavy QCD axion

Jul 27, 2021, 4:00 PM


Parallel session talk Cosmology T02: Cosmology


Ricardo Zambujal Ferreira (IFAE-Barcelona)


Heavy QCD axion models are motivated by the so-called "quality problem", the sensitivity of the QCD axion to misaligned contributions to its potential.
In this talk I will show that despite the absence of axion relics today, these models can generically produce a large amount of gravitational waves, a non-vanishing theta angle and, in some cases, both signals simultaneously.
Therefore, I will argue that GW observatories (e.g. LIGO-VIRGO-KAGRA, LISA) and future neutron and proton EDM experiments are good laboratories to search for the Heavy QCD axion.

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