The infrared-ultraviolet connection

Abstract

Physics below 300 GeV is termed infrared, and physics above 1 TeV is called ultraviolet. Some aspects of the relation between these two regions are discussed. It is argued that the symmetries of the infrared must be symmetries in the ultraviolet. Furthermore, naturalness within the context of the standard model is considered. It is concluded that there is either a threshold in the TeV region, or alternatively a certain mass formula holds. This formula, when true, might be indicative for an underlying supersymmetry.