Branes and black holes in collision

Antonino Flachi, Takahiro Tanaka

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

We study the collision of a brane with a black hole. Our aim is to explore the topology changing process of perforation of a brane. The brane is described as a field theoretical domain wall in the context of an axionlike model consisting of a complex scalar effective field theory with approximate U(1) symmetry. We simulate numerically the dynamics of the collision and illustrate the transition from the configuration without a hole to the pierced one with the aid of a phase diagram. The process of perforation is found to depend on the collisional velocity, and, contrary to our expectation, we observe that above a critical value of the velocity, the black hole has no chance to perforate the wall. That is: high energy collisions do not assist piercing. We also show that, only when the model parameters are fine-tuned so that the energy scale of the string is very close to that of the domain wall, the collision of the wall with the black hole has a possibility to provide a mechanism to erase domain walls, if the hole expands. However, in such cases, domain walls will form with many holes edged by a string and therefore disappear eventually. Therefore this mechanism is unlikely to be a solution to the cosmological domain wall problem, although it may cause some minor effects on the evolution of a domain wall network.

Original languageEnglish
Article number025007
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume76
Issue number2
DOIs
Publication statusPublished - 2007 Jul 9
Externally publishedYes

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domain wall
collisions
perforation
strings
piercing
topology
phase diagrams
scalars
energy
causes
symmetry
configurations

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Branes and black holes in collision. / Flachi, Antonino; Tanaka, Takahiro.

In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 76, No. 2, 025007, 09.07.2007.

Research output: Contribution to journalArticle

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