Connections between Big and Small

Big-Bang cosmology and ideas for possible physics beyond the Standard Model of particle physics are introduced. The density budget of the Universe is audited, and the issues involved in calculating the baron density from microphysics are mentioned, as is the role of cold dark matter in the formation of cosmological structures. Candidates for cold dark matter are introduced, with particular attention to the lightest supersymmetric particle and metastable superheavy relics. Prospects for detecting supersymmetric dark matter in non-accelerator experiments are assessed, and the possible role of decays in generating ultra-high-energy cosmic rays is discussed. More details of these and other astroparticle topics are presented during the rest of this Summer Institute. ∗ c © 2003 by John Ellis.