New matter effects and BBN constraints for mass-varying neutrinos

Neal Weiner, Kathryn Zurek

    Research output: Contribution to journalArticle

    Abstract

    The presence of light (mA∼10-6eV) scalar fields in the early universe can modify the cosmology of neutrinos considerably by allowing their masses to vary on cosmological times. In this paper, we consider the effect of Planck-suppressed couplings of this scalar to electrons and show that such couplings easily can make new sterile states thermally inaccessible in the early universe, preserving the successes of big bang nucleosynthesis predictions. We consider the circumstances under which these effects give the proper initial conditions for recently considered models of neutrino dark energy, and consider limits from tests of the equivalence principle. The parameters which satisfy cosmological constraints naturally give rise to interesting signals in terrestrial neutrino oscillation experiments.

    Original languageEnglish (US)
    Article number023517
    JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
    Volume74
    Issue number2
    DOIs
    StatePublished - 2006

    Fingerprint

    Early Universe
    Neutrinos
    neutrinos
    Equivalence Principle
    Neutrino Oscillations
    Dark Energy
    universe
    Cosmology
    scalars
    Scalar Field
    Initial conditions
    Scalar
    Vary
    Electron
    dark energy
    nuclear fusion
    preserving
    cosmology
    equivalence
    Prediction

    ASJC Scopus subject areas

    • Physics and Astronomy(all)
    • Nuclear and High Energy Physics
    • Mathematical Physics

    Cite this

    New matter effects and BBN constraints for mass-varying neutrinos. / Weiner, Neal; Zurek, Kathryn.

    In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 74, No. 2, 023517, 2006.

    Research output: Contribution to journalArticle

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