Colliders as a simultaneous probe of supersymmetric dark matter and Terascale cosmology

Abstract

Terascale supersymmetry has the potential to provide a natural explanation of the dominant dark matter component of the standard lambda-CDM cosmology. However once we impose the constraints on minimal supersymmetry parameters from current particle physics data, a satisfactory dark matter abundance is no longer prima facie natural. This Neutralino Tuning Problem could be a hint of nonstandard cosmology during and/or after the Terascale era. To quantify this possibility, we introduce an alternative cosmological benchmark based upon a simple model of quintessential inflation. This benchmark has no free parameters, so for a given supersymmetry model it allows an unambiguous prediction of the dark matter relic density. As a example, we scan over the parameter space of the CMSSM, comparing the neutralino relic density predictions with the bounds from WMAP. We find that the WMAP--allowed regions of the CMSSM are an order of magnitude larger if we use the alternative cosmological benchmark, as opposed to lambda-CDM. Initial results from the CERN Large Hadron Collider will distinguish between the two allowed regions.

14 pages, 8 figures

References in corpus (2)

• The Well-Tempered Neutralino
• Abundance of Cosmological Relics in Low-Temperature Scenarios

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• Connecting LHC, ILC, and Quintessence
• Quintessential Kination and Thermal Production of Gravitinos and Axinos
• Dilaton dominance in the early Universe dilutes Dark Matter relic abundances
• Quintessential Kination and Leptogenesis
• Self-accelerating solutions of scalar-tensor gravity
• The Effect of Lensing on the Large-Scale CMB Anisotropy