Ultra-light axions
Cosmological/astrophysical limits (two sigma) on the ultra-light axion energy density vs. particle mass.
Solid = current limit; thick line = projected limit.
Cosmological/astrophysical limits (two sigma) on the ultra-light axion energy density vs. particle mass.
Solid = current limit; thick line = projected limit.
Cosmological limits (two sigma) on the ultra-light axion energy density vs. particle mass.
Solid = current limit; thick line = projected limit (Stage IV sensitivity)
Limits (two sigma) on the proton-DM cross section vs. particle mass.