Field theory models for variable cosmological constant

Gia Dvali, Alexander Vilenkin

    Research output: Contribution to journalArticlepeer-review

    Abstract

    Anthropic solutions to the cosmological constant problem require seemingly unnatural scalar field potentials with a very small slope or domain walls (branes) with a very small coupling to a four-form field. Here we introduce a class of models in which the smallness of the corresponding parameters can be attributed to a spontaneously broken discrete symmetry. We also demonstrate the equivalence of scalar field and four-form models. Finally, we show how our models can be naturally embedded into a left-right symmetric extension of the standard model.

    Original languageEnglish (US)
    Article number063509
    JournalPhysical Review D
    Volume64
    Issue number6
    DOIs
    StatePublished - 2001

    ASJC Scopus subject areas

    • Physics and Astronomy (miscellaneous)

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