Final Activity Report Summary - LHC-PHYS (Early discoveries at the LHC with the CMS silicon strip tracker)
On the one hand, some characteristics of these particles, like their mass, are already accurately known from previous experiments, and hence they are extremely useful for issues like detector calibration and alignment. On the other hand, the underlying physics production mechanism is still not well understood. During the project, different studies were performed on how to shed light on their production mechanism. It resulted in presentations in international conferences and publications. In addition, still using quarkonia, studies were performed on how to extract the muon efficiency at low transverse momenta.