The Greek contribution to the ATLAS Muon Spectrometer and the physics studies

The ATLAS Muon Spectrometer is an essential part of the ATLAS Detector at the LHC. It is used both for triggering and for momentum measurements of the muons. The Greek contribution to the construction and commissioning of the Muon Spectrometer is reviewed. In addition, the physics studies, leading to lepton final states, performed by the Greek groups are summarized.