The Top Window for dark matter

Abstract

We investigate a scenario that the top quark is the only window to the dark matter particle. We use the effective Lagrangian approach to write down the interaction between the top quark and the dark matter particle. Requiring the dark matter satisfying the relic density we obtain the size of the effective interaction. We show that the scenario can be made consistent with the direct and indirect detection experiments by adjusting the size of the effective coupling. Finally, we calculate the production cross section for $t\bar{t}+\chi \bar{\chi }$ at the Large Hadron Collider (LHC), which will give rise to an interesting signature of a top-pair plus large missing energy.

17 pages including 8 figures; added references and a footnote

References in corpus (8)

• Observation of an anomalous positron abundance in the cosmic radiation
• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Likelihoods and Parameters from the WMAP data
• Constraints on Dark Matter from Colliders
• A new measurement of the antiproton-to-proton flux ratio up to 100 GeV in the cosmic radiation
• Top-tagging: A Method for Identifying Boosted Hadronic Tops
• The Tevatron at the Frontier of Dark Matter Direct Detection
• First Dark Matter Results from the XENON100 Experiment
• The GALPROP Cosmic-Ray Propagation Code

Cited by in corpus (2)

• Gamma-ray Constraints on Effective Interactions of the Dark Matter
• Cosmic Antiproton Constraints on Effective Interactions of the Dark Matter