Nuclear scattering of dark matter coupled to a new light scalar

Douglas P. Finkbeiner, Tracy R. Slatyer, Neal Weiner

    Research output: Contribution to journalArticle

    Abstract

    We consider the nuclear scattering cross section for the exciting dark matter (XDM) model. In XDM, the weakly interacting massive particles (WIMPs) couple to the standard model only via an intermediate light scalar which mixes with the Higgs: this leads to a suppression in the nuclear scattering cross section relative to models in which the WIMPs couple to the Higgs directly. We estimate this suppression factor to be of order 10-5. The elastic nuclear scattering cross section for XDM can also be computed directly: we perform this computation for XDM coupled to the Higgs sector of the standard model and find a spin-independent cross section in the order of 4×10-13pb in the decoupling limit, which is not within the range of any near-term direct detection experiments. However, if the XDM dark sector is instead coupled to a two-Higgs-doublet model, the spin-independent nuclear scattering cross section can be enhanced by up to 4 orders of magnitude for large tan β, which should be observable in the upcoming SuperCDMS and ton-scale xenon experiments.

    Original languageEnglish (US)
    Article number116006
    JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
    Volume78
    Issue number11
    DOIs
    StatePublished - Dec 1 2008

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    nuclear scattering
    scattering cross sections
    dark matter
    scalars
    weakly interacting massive particles
    sectors
    retarding
    decoupling
    xenon
    elastic scattering
    cross sections
    estimates

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics

    Cite this

    Nuclear scattering of dark matter coupled to a new light scalar. / Finkbeiner, Douglas P.; Slatyer, Tracy R.; Weiner, Neal.

    In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 78, No. 11, 116006, 01.12.2008.

    Research output: Contribution to journalArticle

    Finkbeiner, Douglas P. ; Slatyer, Tracy R. ; Weiner, Neal. / Nuclear scattering of dark matter coupled to a new light scalar. In: Physical Review D - Particles, Fields, Gravitation and Cosmology. 2008 ; Vol. 78, No. 11.
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