Collision of domain walls and reheating of the brane universe

Yu Ichi Takamizu, Keiichi Maeda

    Research output: Contribution to journalArticle

    26 Citations (Scopus)

    Abstract

    We study particle production at the collision of two domain walls in 5-dimensional Minkowski spacetime. This may provide the reheating mechanism of an ekpyrotic (or cyclic) brane universe, in which two BPS branes collide and evolve into a hot big bang universe. We evaluate a production rate of particles confined to the domain wall. The energy density of created particles is given as [Formula Presented] where [Formula Presented] is a coupling constant of particles to a domain-wall scalar field, [Formula Presented] is the number of bounces at the collision and [Formula Presented] is the fundamental mass scale of the domain wall. It does not depend on the width [Formula Presented] of the domain wall, although the typical energy scale of created particles is given by [Formula Presented]. The reheating temperature is evaluated as [Formula Presented]. In order to have the baryogenesis at the electro-weak energy scale, the fundamental mass scale is constrained as [Formula Presented] for [Formula Presented].

    Original languageEnglish
    Number of pages1
    JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
    Volume70
    Issue number12
    DOIs
    Publication statusPublished - 2004 Jan 1

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    domain wall
    universe
    heating
    collisions
    particle production
    flux density
    scalars
    energy

    ASJC Scopus subject areas

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

    Cite this

    Collision of domain walls and reheating of the brane universe. / Takamizu, Yu Ichi; Maeda, Keiichi.

    In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 70, No. 12, 01.01.2004.

    Research output: Contribution to journalArticle

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