Hi all, I recently flipped through a paper which got some press several years back, entitled "A Scenario for Strong Gravity in Particle Physics: An alternative mechanism for black holes to appear at accelerator experiments." There are a lot of speculative elements in the work, but the thing that struck me is their conclusion (or one of them): "In other words, the model predicts that any states to be found at sub-Planckian masses will behave normally, and will be essentially identical to elementary particles. "Perhaps the most reassuring conclusion that we find is that the dynamical solution in either model forces the sub-Planckian states to obey the Heisenberg uncertainty principle, and thus allows them to act as normal fundamental particles," the scientists write." Even if the authors' conjectures about strong gravity and shielding were true, wouldn't the existence of an event horizon surrounding a sub-Planckian hole imply that it would not act like a regular elementary particle (e.g., absorbing and releasing photons). There is some discussion of stationary states later in the paper, but I'm not clear if those states are the same as elementary particles. For reference, the arXiv link is here: https://arxiv.org/abs/0905.1667 (and granted, as far as I can tell, the paper does not appear in a peer-reviewed journal).