TL;DR
This paper discusses various theoretical explanations for cosmic acceleration, emphasizing modifications to General Relativity as a potential cause, and reviews current approaches in modern cosmology.
Contribution
It provides a concise overview of different theories, especially focusing on modified gravity models, addressing a key challenge in understanding cosmic acceleration.
Findings
Explores modifications to General Relativity as explanations for acceleration
Summarizes current theoretical approaches in cosmology
Highlights open questions in the field
Abstract
Understanding the space of possible theoretical explanations for the observed cosmic acceleration is a central challenge of modern cosmology. This brief document sketches selected aspects of approaches to this problem, focusing on the possibility that a modification to General Relativity is responsible for acceleration, as presented as a plenary talk at the ICHEP 2012 conference.
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