Breaking the Dark Force

Abstract

Recently Arkani-Hamed, Finkbeiner, Slatyer and Weiner proposed a unified explanation to the set of experimental and observational anomalies with possible connections to Dark Matter (DM). A central role is played by GeV scale "dark" gauge bosons exchanged by the weak scale DM. Motivated by this proposal, we build an explicit model of DM in the context of Weak Scale Supersymmetry (SUSY). We employ high-scale SUSY-breaking and invoke the Giudice-Masiero mechanism to generate the weak scale DM masses. By sequestering the dark sector from the SUSY-breaking "hidden" sector, it naturally acquires GeV scale soft masses that help generate the dark gauge boson mass. The visible MSSM sector is not fully sequestered and acquires gaugino-mediated soft terms at the weak scale. This hierarchy of scales naturally leads to the Sommerfeld enhancement of DM annihilations needed to account for the electron/positron excesses in the PAMELA and ATIC experiments. The possibility of co-existing species of DM is used to show how the INTEGRAL and DAMA anomalies can both be explained. We study the cosmological constraints on the new stable or long-lived light particles that appear in our models. We discuss the lepton-jet collider signals suggested by Arkani-Hamed and Weiner, and find that they are not guaranteed in our construction.

24 pages, 4 figures. V2 Discussion of dark photon decays into the SM slightly modified. Discussion of lepton jets and other collider signatures elaborated. Discussion of DM abundance and parameter counting expanded. Refs. added. Valuable discussion with Maxim Pospelov acknowledged V3 Journal version. Minor corrections

References in corpus (12)

• Observation of an anomalous positron abundance in the cosmic radiation
• A Theory of Dark Matter
• Secluded WIMP Dark Matter
• First results from DAMA/LIBRA and the combined results with DAMA/NaI
• A new measurement of the antiproton-to-proton flux ratio up to 100 GeV in the cosmic radiation
• Exciting Dark Matter and the INTEGRAL/SPI 511 keV signal
• Non-Abelian Dark Sectors and Their Collider Signatures
• Kinetic Mixing as the Origin of Light Dark Scales
• Dark matter and sub-GeV hidden U(1) in GMSB models
• Measuring the Dark Force at the LHC
• Extended Anomaly Mediation and New Physics at 10 TeV
• Cosmic Ray Positrons from Annihilations into a New, Heavy Lepton

Cited by in corpus (6)

• Probing Dark Forces and Light Hidden Sectors at Low-Energy e+e- Colliders
• Kinetic Mixing as the Origin of Light Dark Scales
• Direct Detection of Multi-component Secluded WIMPs
• Capture of Inelastic Dark Matter in the Sun
• PAMELA, DAMA, INTEGRAL and Signatures of Metastable Excited WIMPs
• ATIC, PAMELA, HESS, Fermi and nearby Dark Matter subhalos