Non-abelian dark sectors and their collider signatures

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

    Research output: Contribution to journalArticle

    Abstract

    Motivated by the recent proliferation of observed astrophysical anomalies, Arkani-Hamed et al. have proposed a model in which dark matter is charged under a non-abelian ''dark'' gauge symmetry that is broken at ∼1 GeV. In this paper, we present a survey of concrete models realizing such a scenario, followed by a largely model-independent study of collider phenomenology relevant to the Tevatron and the LHC. We address some model building issues that are easily surmounted to accommodate the astrophysics. While SUSY is not necessary, we argue that it is theoretically well-motivated because the GeV scale is automatically generated. Specifically, we propose a novel mechanism by which mixed D-terms in the dark sector induce either SUSY breaking or a super-Higgs mechanism precisely at a GeV. Furthermore, we elaborate on the original proposal of Arkani-Hamed et al. in which the dark matter acts as a messenger of gauge mediation to the dark sector. In our collider analysis we present cross-sections for dominant production channels and lifetime estimates for primary decay modes. We find that dark gauge bosons can be produced at the Tevatron and the LHC, either through a process analogous to prompt photon production or through a rare Z decay channel. Dark gauge bosons will decay back to the SM via ''lepton jets'' which typically contain 2$">2 and as many as 8 leptons, significantly improving their discovery potential. Since SUSY decays from the MSSM will eventually cascade down to these lepton jets, the discovery potential for direct electroweak-ino production may also be improved. Exploiting the unique kinematics, we find that it is possible to reconstruct the mass of the MSSM LSP. We also present several non-SUSY and SUSY decay channels that have displaced vertices and lead to multiple leptons with partially correlated impact parameters.

    Original languageEnglish (US)
    Article number014
    JournalJournal of High Energy Physics
    Volume2009
    Issue number4
    DOIs
    StatePublished - 2009

    Fingerprint

    sectors
    signatures
    leptons
    decay
    dark matter
    astrophysics
    bosons
    mediation
    phenomenology
    proposals
    cascades
    apexes
    kinematics
    anomalies
    life (durability)
    cross sections
    photons
    symmetry
    estimates

    Keywords

    • Supersymmetry phenomenology

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics

    Cite this

    Baumgart, M., Cheung, C., Ruderman, J. T., Wang, L. T., & Yavin, I. (2009). Non-abelian dark sectors and their collider signatures. Journal of High Energy Physics, 2009(4), [014]. https://doi.org/10.1088/1126-6708/2009/04/014

    Non-abelian dark sectors and their collider signatures. / Baumgart, Matthew; Cheung, Clifford; Ruderman, Joshua T.; Wang, Lian Tao; Yavin, Itay.

    In: Journal of High Energy Physics, Vol. 2009, No. 4, 014, 2009.

    Research output: Contribution to journalArticle

    Baumgart, M, Cheung, C, Ruderman, JT, Wang, LT & Yavin, I 2009, 'Non-abelian dark sectors and their collider signatures', Journal of High Energy Physics, vol. 2009, no. 4, 014. https://doi.org/10.1088/1126-6708/2009/04/014
    Baumgart, Matthew ; Cheung, Clifford ; Ruderman, Joshua T. ; Wang, Lian Tao ; Yavin, Itay. / Non-abelian dark sectors and their collider signatures. In: Journal of High Energy Physics. 2009 ; Vol. 2009, No. 4.
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