Non-abelian dark sectors and their collider signatures

By Matthew Baumgart, C. Cheung, J. Ruderman, Lian-Tao Wang, I. Yavin. 2009

277 citations recorded by the source corpus.

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 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.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/fcfdddfade2b579aada1d4bb5fc53a138885d22e

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Citations in the corpus

Hidden charged dark matter (2009, background): “Some of these implications have been considered previously [12–17], and others are possible [35–50].”
The waning of the WIMP? A review of models, searches, and constraints (2017, background): “This last choice is inspired by models in which the kinetic mixing parameter is radiatively generated upon integrating out heavy degrees of freedom charged under both U(1)V and U(1)X [251, 255].”
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Probing dark forces and light hidden sectors at low-energy e+e- colliders (2009, background): “Caricatures of these events, with and without a recoiling photon, are shown in Figure 2. The decay phenomenology is similar in hadron colliders [ 22 ], and the pure Higgsed Abelian case for B-factories has been discussed in [16], though the dominant production modes and kinematics considered here ar”
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Searching for long-lived particles beyond the Standard Model at the Large Hadron Collider (2019, methodology): “The analysis presented above was reinterpreted using a Dark SUSY model [30, 155], in which an additional dark UD(1) Figure 32.”