Black Hole Mass Must Be Quantized, Say Physicists - Technology Review

Black Hole Mass Must Be Quantized, Say Physicists - Technology Review: If black hole mass is not quantised, then the mass could take essentially any value. And if that were the case, the rate of production of micro black holes would be infinite: they could form in any collision, at any energy.

Since that's clearly not the case, the masses of micro black holes must be quantised.

That immediately raises a number of important questions, not least of which is what governs black hole quantisation.