Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2007-07-18
Phys.Rev.D76:095005,2007
Physics
High Energy Physics
High Energy Physics - Phenomenology
17 pages. v2: additions to figures 4 and 6
Scientific paper
10.1103/PhysRevD.76.095005
Top squark-mediated annihilation of bino-like neutralinos to top-antitop pairs can play the dominant role in obtaining a thermal relic dark matter abundance in agreement with observations. In a previous paper, it was argued that this can occur naturally in models of compressed supersymmetry, which feature a running gluino mass parameter that is substantially smaller than the wino mass parameter at the scale of apparent gauge coupling unification. Here I study in some more detail the parameter space in which this is viable, and compare to other scenarios for obtaining the observed dark matter density. I then study the possibility of detecting the dark matter directly in future experiments. The prospects are consistently very promising for a wide variety of model parameters within this scenario.
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