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We derive the minimum spin value for the light black holes, $10^{-33}-1 \;M_\odot$ ($1-10^{33} \; {\rm gr}$), to experience superradiance via scalar,vector and tensor perturbations, corresponding to boson mass range$10^{-12}-10^{21}$ eV. We find that superradiance instability can happen evenfor very low spin values, ${\tilde a} \sim 10^{-5}-10^{-2}$. Since light blackholes (BHs) are very unstable to these perturbations and sensitive probes ofbosonic particles, a single moderately spinning BH can probe/cover 2-5 ordersof magnitude scalar (axion), vector (dark photon and/or photon with effectivemass) and spin-2 mass. If superradiance exists, this drives the spin of the BHto almost zero immediately, independent of the BH formation mechanism. In thecase that superradiance is not observed due to self-interactions, we findlimits on the axion decay constant and energy density. We finally discussbriefly the implications on the Standard Model bosons and Higgsself-interaction.

Superradiance Properties of Light Black Holes and $10^{-12}$-$10^{21}$ eV Bosons