EpiStack

H-14 - LHC strong-gravity objects would be near-threshold quantum or stringy states, not semiclassical thermal black holes

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Properties9
type
hypothesis
id
H-14
state
active
question
Would LHC-produced gravitational objects be in the semiclassical regime where the thermal Hawking-evaporation description is trustworthy?
statement
In low-scale-gravity scenarios, objects produced at the LHC would almost always be near-threshold, low-entropy quantum-gravitational or stringy states below the semiclassical regime; truly thermal black holes (the regime where the standard Hawking-evaporation description applies) are very unlikely to be produced at all, and if so only in a very limited parameter regime.
cluster
HC-3 - Nature and decay of an LHC-produced strong-gravity object
source
S-50 - Meade, Randall 2008 — Black Holes and Quantum Gravity at the LHC
locator
Abstract; §2.2 Thermality; §3; §5 Conclusions
quote
We find it very unlikely that the LHC will produce conventional black holes. In almost all cases the entropy is too low to trust there is actually a black hole final state.

Consequence drawn in the paper: expected decays are low-multiplicity (typically two-body) final states rather than isotropic high-multiplicity “fireballs”, and near-threshold behavior is governed by unknown quantum gravity rather than by the calculable semiclassical formulae.

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