Changing α with time: Implications for fifth-force-type experiments and quintessence

Gia Dvali, Matias Zaldarriaga

    Research output: Contribution to journalArticlepeer-review

    Abstract

    The time variation of fine structure constant which implies existence of a very weakly coupled ultralight scalar particle is discussed. The α-ion couples to ordinary nucleons, protons, and neutrons through the α dependence of their masses and thus mediates an isotope-dependent long-range force. The strength of the coupling is within a couple of orders of magnitude of the experimental bounds for such forces. The scalar field can play the role of a quintessence field due to a coincidence of the required time scales.

    Original languageEnglish (US)
    Pages (from-to)913031-913034
    Number of pages4
    JournalPhysical Review Letters
    Volume88
    Issue number9
    StatePublished - Mar 4 2002

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

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