Non-abelian dark sectors and their collider signatures
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 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.
Additional Information
© 2009 SISSA. Received: January 26, 2009. Accepted: March 20, 2009. Published: April 3, 2009. We would like to thank Nima Arkani-Hamed, Zohar Komargodski, David Krohn, Jim Olsen, Michele Papucci, Maxim Pospelov, Matt Strassler, Chris Tully, and Neal Weiner for useful discussions. Also, J. T. R. and C. C. would like to thank the Hebrew University for their hospitality during the final stages of this work. L.-T. W. and I. Y. are supported by the National Science Foundation under grant PHY-0756966 and the Department of Energy under grant DE-FG02-90ER40542. J. T. R. is supported by a National Science Foundation fellowship.Attached Files
Published - Matthew_Baumgart_2009_J._High_Energy_Phys._2009_014.pdf
Accepted Version - 0901.0283
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Additional details
- Eprint ID
- 96542
- Resolver ID
- CaltechAUTHORS:20190619-094159603
- PHY-0756966
- NSF
- DE-FG02-90ER40542
- Department of Energy (DOE)
- NSF Graduate Research Fellowship
- Created
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2019-06-19Created from EPrint's datestamp field
- Updated
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2022-07-12Created from EPrint's last_modified field