The top squark-mediated annihilation scenario and direct detection of dark matter in compressed supersymmetry

Details The top squark-mediated annihilation scenario and direct detection of dark matter in compressed supersymmetry The top squark-mediated annihilation scenario and direct detection of dark matter in compressed supersymmetry

Publishing date

2007-07-18

URL

arxiv.org/abs/0707.2812v2

Journals

Phys.Rev.D76:095005,2007

Science

Physics

Field

High Energy Physics

SubField

High Energy Physics - Phenomenology

Additional info

17 pages. v2: additions to figures 4 and 6

Type

Scientific paper

Digital Object Identifier

10.1103/PhysRevD.76.095005

Abstract

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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