Minimal Noncanonical Cosmologies

Abstract

We demonstrate how much it is possible to deviate from the standard cosmological paradigm of inflation-assisted LambdaCDM, keeping within current observational constraints, and without adding to or modifying any theoretical assumptions. We show that within a minimal framework there are many new possibilities, some of them wildly different from the standard picture. We present three illustrative examples of new models, described phenomenologically by a noncanonical scalar field coupled to radiation and matter. These models have interesting implications for inflation, quintessence, reheating, electroweak baryogenesis, and the relic densities of WIMPs and other exotics.

20 pages, 5 figures, 3 tables

Cited by in corpus (10)

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• Constraints on Dark Energy from Galaxy Cluster Gas Mass Fraction versus Redshift data
• Connecting LHC, ILC, and Quintessence
• Colliders as a simultaneous probe of supersymmetric dark matter and Terascale cosmology
• Quintessence, inflation and baryogenesis from a single pseudo-Nambu-Goldstone boson
• Self-accelerating solutions of scalar-tensor gravity
• Experimental signatures of non-standard pre-BBN cosmologies
• A coupled vacuum energy model producing endless alternated phases of accelerated and decelerated expansion