Abstract

The WIMP (weakly interacting dark matter) is currently the leading candidate for what is thought to be dark matter, the cosmological material claimed to make up almost 99% of the matter of the universe and which is indiscernible by means of electromagnetic radiation. There are many research groups dedicated to experimentally isolating WIMPs, and in this paper we describe the work of three of these groups, the Saclay group, DAMA and UKDM. This exploration into the recent history of astroparticle physics serves to illuminate two philosophical issues. First, is confirmatory evidence more compelling if it coordinates results gleaned from independent experimental investigations? And secondly, in justifying experimental conclusions, how strong must this justification be? Are the high standards set by philosophers, in the spirit of Descartes, relevant to experimental research?