Proceedings of the 4th Patras Workshop on Axions, WIMPs and WISPs

The 4th Patras Workshop on Axion, WIMPs and WISPs took place from 18th to 21st June 2008 at DESYHamburg. It was organized and supported by CERN, DESY and the Universities of Hamburg and Patras. The original aim of this series of workshops was to provide academic training to the new generations ofscientists working in the already mature field of axion physics. Since axions are one of the few promi-nent candidates for the dark matter in the universe it was quite natural to widen the scope already in thethird workshop to include also its main alternative, weakly interacting massive particles (WIMPs), asanother central topic. The interest was already moving from one concrete particle to one of the centralquestions of fundamental science today: What is dark matter made of? What hides beyond the successful Standard Model of particle physics?