Effective gravitational equations on a brane world with induced gravity

Kei Ichi Maeda, Shuntaro Mizuno, Takashi Torii

Research output: Contribution to journalArticle

130 Citations (Scopus)

Abstract

We present the effective equations to describe the four-dimensional gravity of a brane world, assuming that a five-dimensional bulk spacetime satisfies the Einstein equations and gravity is confined on the Z2 symmetric brane. Applying this formalism, we study the induced-gravity brane model first proposed by Dvali, Gabadadze, and Porrati. In a generalization of their model, we show that an effective cosmological constant on the brane can be extremely reduced in contrast with the case of the Randall-Sundrum model even if a bulk cosmological constant and a brane tension are not fine tuned.

Original languageEnglish
Article number024033
JournalPhysical Review D
Volume68
Issue number2
DOIs
Publication statusPublished - 2003 Dec 1

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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