LHC Search Finds No Microscopic Black Holes, Tightens Theory Limits
Researchers on the CMS experiment at CERN's Large Hadron Collider searched for microscopic black holes whose fleeting production could reveal quantum gravity or extra dimensions. They found no evidence of such objects, reducing the allowed range for theories that predict them. The team also introduced a signal-selection method that may aid searches for other unknown particles.
Researchers on CMS used LHC collision data from 2016–2018 to look for signs of microscopic black holes. Such objects, if real, would vanish almost instantly, but their traces could illuminate how gravity behaves at quantum scales. No candidates appeared, so the team placed tighter constraints on models predicting them, reaching roughly 12 TeV under tested assumptions.
Earlier CMS and ATLAS searches had also seen nothing with smaller datasets. The new work adds a machine-learning-based selection strategy for spotting rare signals amid vast collision records, which may help future hunts for other undiscovered particles.
This result may mainly affect particle physicists and theorists by narrowing viable models and guiding future LHC searches. The signal-selection technique could also influence data-intensive research beyond physics, while the public may see it as another step in testing fundamental theories. Its societal impact is likely indirect, shaping scientific knowledge and methods rather than near-term technology.