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arXiv · 1208.4605

The impact of heavy-quark loops on LHC dark matter searches

Ulrich Haisch·Felix Kahlhoefer·James Unwin
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Abstract

If only tree-level processes are included in the analysis, LHC monojet searches give weak constraints on the dark matter-proton scattering cross section arising from the exchange of a new heavy scalar or pseudoscalar mediator with Yukawa-like couplings to quarks. In this letter we calculate the constraints on these interactions from the CMS 5.0/fb and ATLAS 4.7/fb searches for jets with missing energy including the effects of heavy-quark loops. We find that the inclusion of such contributions leads to a dramatic increase in the predicted cross section and therefore a significant improvement of the bounds from LHC searches.

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Ulrich Haisch, Felix Kahlhoefer, James Unwin. 2013-08-02. The impact of heavy-quark loops on LHC dark matter searches. https://doi.org/10.1007/jhep07(2013)125

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