Dark Energy and Cosmology

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.Comment: 11 pages, invited plenary presentation delivered at the ICHEP 2012 conference. arXiv admin note: text overlap with arXiv:1105.0721, arXiv:1011.0861, arXiv:astro-ph/060751