New Constraints on Dark Matter from CMS and ATLAS Data

TL;DR

This paper examines how early LHC SUSY searches constrain dark matter models, showing significant impacts on detection prospects and highlighting regions of parameter space still viable or affected by these constraints.

Contribution

It provides a detailed analysis of the impact of CMS and ATLAS SUSY searches on dark matter parameter space within minimal and non-universal supergravity models.

Findings

Large portion of dark matter signature space is depleted in minimal supergravity.

Higgs pole and Hyperbolic Branch regions remain unaffected by early LHC searches.

Non-universal soft breaking models can replenish some depleted dark matter regions.

Abstract

Constraints on dark matter from the first CMS and ATLAS SUSY searches are investigated. It is shown that within the minimal supergravity model, the early search for supersymmetry at the LHC has depleted a large portion of the signature space in dark matter direct detection experiments. In particular, the prospects for detecting signals of dark matter in the XENON and CDMS experiments are significantly affected in the low neutralino mass region. Here the relic density of dark matter typically arises from slepton coannihilations in the early universe. In contrast, it is found that the CMS and ATLAS analyses leave untouched the Higgs pole and the Hyperbolic Branch/Focus Point regions, which are now being probed by the most recent XENON results. Analysis is also done for supergravity models with non-universal soft breaking where one finds that a part of the dark matter signature space depleted by the CMS and ATLAS cuts in the minimal SUGRA case is repopulated. Thus, observation of dark matter in the LHC depleted region of minimal supergravity may indicate non-universalities in soft breaking.