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Who’s Afraid Of A Small Black Hole?. Lucas Ellerbroek Institute for Theoretical Physics, UvA, Amsterdam. Who’s afraid of a small black hole?. What is a black hole? How can we create one? Why is that not dangerous? What would we learn from that?. What is a black hole?. Very dense object - PowerPoint PPT Presentation
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Who’s Afraid Of A Small Black Hole?Lucas Ellerbroek
Institute for Theoretical Physics, UvA, Amsterdam
Who’s afraid of a small black hole?
What is a black hole? How can we create one? Why is that not dangerous? What would we learn from that?
What is a black hole? Very dense object Gravity deforms spacetime Event Horizon at RSchw
Black hole species:
Supermassive
M ~ 1040 kg
Stellar
M ~ 1030 kg
Primordial
M ~ 1012 kg
Microscopic
M ~ 10-27 kg
Can we create a black hole?
Black hole creation is impossible! Or is it...?
EXTRA DIMENSIONS
High-energy collision:
Minimum size of black hole = Mpl= Minimal mass for gravity
At the LHC:
Higher Dimensional scenarios
4D Brane(visible universe)
Bulk space(n extra dimensions)
M
if Mpl ~ 1 TeV: Black holes at LHC!
We have created an all-eating monster!!
Mpl lower than in 4DGravity on brane:
R ~ 1 mm
Why is the LHC black hole not dangerous?
Stephen Hawking:Black holes have a temperature
Hawking Evaporation
Black holes are thermal blackbodies The smaller, the hotter:
LHC black holes will evaporate instantaneously: If Hawking radiation does not exist, they will escape from Earth anyway
Discover hidden dimensions Solve hierarchy problem Observe Hawking radiation Observe Quantum-gravitational effects Explain cosmic dark matter
What can we learn from a mini black hole?
Plasma
Gold nuclei
Creating a stable black hole: science or fiction?
BlackHole
Protons TBH < TPlasma
Conclusion Creating a black hole: proof for extra dimensions It evaporates immediately: don’t be afraid Detection would lead to major discoveries Predict methods to create a stable black hole