Kinetic mixing as the origin of a light dark-gauge-group scale

Clifford Cheung, Joshua T. Ruderman, Lian Tao Wang, Itay Yavin

    Research output: Contribution to journalArticle

    Abstract

    We propose a model in which supersymmetric weak scale dark matter is charged under a U(1)d dark gauge symmetry. Kinetic mixing between U(1)d and hypercharge generates the appropriate hierarchy of scales needed to explain PAMELA and ATIC with a GeV scale force carrier and DAMA (or INTEGRAL) using the proposals of inelastic (or, respectively, exciting) dark matter. Because of the extreme simplicity of this setup, observational constraints lead to unambiguous determination of the model parameters. In particular, the DAMA scattering cross section is directly related to the size of the hypercharge D-term vacuum expectation value. The known relic abundance of dark matter can be used to fix the ratio of the dark sector coupling to the dark matter mass. Finally, the recent observation of cosmic ray positron and electron excesses can be used to fix the mass of the dark matter through the observation of a shoulder in the spectrum and the size of the kinetic mixing by fitting to the rate. These parameters can be used to make further predictions, which can be checked at future direct detection, indirect detection, as well as collider experiments.

    Original languageEnglish (US)
    Article number035008
    JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
    Volume80
    Issue number3
    DOIs
    StatePublished - Aug 12 2009

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    ASJC Scopus subject areas

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

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