Possible Implications of QCD Axion Dark Matter Constraints from Helioscopes and Haloscopes for the String Theory Landscape

Author(s): Naomi Gendler and David J. E. Marsh Laboratory experiments have the capacity to detect the QCD axion in the next decade, and precisely measure its mass, if it composes the majority of the dark matter. In type IIB string theory on Calabi-Yau threefolds in the geometric regime, the QCD axion mass, ${m}_{a}$, is strongly correlated with … [Phys. Rev. Lett. 134, 081602] Published Thu Feb 27, 2025