Dark Sector Cosmology
Ricardo C. G. Landim

TL;DR
This paper explores scalar and vector field models of dark energy interacting with dark matter, aiming to address the cosmological constant problem and the universe's accelerated expansion.
Contribution
It introduces field theory models of dark energy and dark matter interaction, expanding beyond phenomenological approaches with a focus on scalar and vector fields.
Findings
Models show potential to explain accelerated expansion
Interaction can alleviate coincidence problem
Field-based models offer a more fundamental understanding
Abstract
The dark side of the universe is mysterious and its nature is still unknown. In fact, this poses perhaps as the biggest challenge in the modern cosmology. The two components of the dark sector (dark matter and dark energy) correspond today to around ninety five percent of the universe. The simplest dark energy candidate is a cosmological constant. However, this attempt presents a huge discrepancy of 120 orders of magnitude between the theoretical prediction and the observed data. Such a huge disparity motivates physicists to look into a more sophisticated models. This can be done either looking for a deeper understanding of where the cosmological constant comes from, if one wants to derive it from first principles, or considering other possibilities for accelerated expansion, such as modifications of general relativity, additional matter fields and so on. Still regarding a dynamical…
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Taxonomy
TopicsCosmology and Gravitation Theories · Galaxies: Formation, Evolution, Phenomena · Dark Matter and Cosmic Phenomena
