Kavli Affiliate: Ulrich Sperhake

| First 5 Authors: Tomas Andrade, Pau Figueras, Ulrich Sperhake, ,

| Summary:

We study collisions of boosted rotating black holes in $D=6$ and 7 spacetime

dimensions with a non-zero impact parameter. We find that there exists an open

set of initial conditions such that the intermediate state of the collision is

a black hole with a dumbbell-like horizon which is unstable to a local

Gregory-Laflamme-type instability. We are able to provide convincing numerical

evidence that the evolution of such an instability leads to a pinch off of the

horizon in finite asymptotic time thus forming a naked singularity, as in

similar unstable black holes. Since the black holes in the initial state are

stable, this is the first genuinely generic evidence for the violation of the

Weak Cosmic Censorship Conjecture in higher dimensional asymptotically flat

spacetimes.

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