On String Theory Expectations for Photon Couplings to Axion-Like Particles

Abstract

ALP-photon couplings are modeled in large ensembles of string vacua and random matrix theories. In all cases, the effective coupling increases polynomially in the number of ALPs, of which hundreds or thousands are expected in the string ensembles, many of which are ultralight. The expected value of the couplings $g_{a\gamma \gamma }\simeq 10^{-12}{\text{GeV}}^{-1}-10^{-10}{\text{GeV}}^{-1}$ provide viable targets for future x-ray telescopes and axion helioscopes, and in some cases are already in tension with existing data.

12 pages, 8 figures

References in corpus (10)

• Physics potential of the International Axion Observatory (IAXO)
• On Algorithmic Universality in F-theory Compactifications
• String Theory and the Dark Glueball Problem
• Probing ALPs and the Axiverse with Superconducting Radiofrequency Cavities
• ${\alpha }^{\prime }$ Inflation: Moduli Stabilisation and Observable Tensors from Higher Derivatives
• Heavy Tails in Calabi-Yau Moduli Spaces
• Projected bounds on ALPs from Athena
• On Axion Reheating in the String Landscape
• First Results from ABRACADABRA-10cm: A Search for Low-Mass Axion Dark Matter
• The Electroweak Axion, Dark Energy, Inflation and Baryonic Matter

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