Andrade, TomásEmparan García de Salazar, Roberto A.Licht, DavidLuna i Perelló, Raimon2021-11-242021-11-242019-04-011126-6708https://hdl.handle.net/2445/181442We argue that cosmic censorship is violated in the collision of two black holes in high spacetime dimension D when the initial total angular momentum is sufficiently large. The two black holes merge and form an unstable bar-like horizon, which grows a neck in its middle that pinches down with diverging curvature. When D is large, the emission of gravitational radiation is strongly suppressed and cannot spin down the system to a stable rotating black hole before the neck grows. The phenomenon is demonstrated using simple numerical simulations of the effective theory in the 1/D expansion. We propose that, even though cosmic censorship is violated, the loss of predictability is small independently of D.application/pdfengcc-by (c) Andrade, Tomás et al., 2019https://creativecommons.org/licenses/by/4.0/Forats negres (Astronomia)AstrofísicaGravetatBlack holes (Astronomy)AstrophysicsGravityinfo:eu-repo/semantics/article6962202021-11-24info:eu-repo/semantics/openAccess