On white holes as particle accelerators

Abstract

We analyze scenarios of particle collisions in the metric of a nonextremal black hole that can potentially lead to ultrahigh energy $E_{c.m.}$ in their centre of mass frame. Particle 1 comes from infinity to the black hole horizon while particle 2 emerges from a white hole region. It is shown that unbounded $E_{c.m.}$  require that particle 2 pass close to the bifurcation point. The analogy with collisions inside the horizon is discussed.

10 pages. 2 figures. Presentation improved, Ref. 11 added. To appear in Grav. Cosmol

References in corpus (2)

• Acceleration of particles by nonrotating charged black holes
• Are black holes totally black?

Cited by in corpus (8)

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• General radially moving references frames in the black hole background
• Super-Penrose process for extremal charged white holes
• High energy head-on particle collisions near event horizons: classifcation of scenarios
• Super-Penrose process for extremal rotating neutral white holes