Searching for axion-like particles with SPHEREx

M. Regis, M. Taoso and J. Terol Calvo

JCAP 05 (2025) 008

arXiv:2412.12286 · Journal version · INSPIRE

What it is about

The same decay line, at longer wavelengths. SPHEREx is surveying the whole sky in the near infrared, the right band for axion-like particles of around an eV. We assess how deep the survey can go and which targets are most promising.

Projected SPHEREx sensitivity to the axion–photon coupling: deep-field observations of the Milky Way halo and the LMC, and an all-sky stack of dwarf spheroidals, against existing bounds.
Projected SPHEREx sensitivity to the axion–photon coupling: deep-field observations of the Milky Way halo and the LMC, and an all-sky stack of dwarf spheroidals, against existing bounds.

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