The ATLAS Muon Trigger Performance in pp collisions at sqrt(s) = 8 TeV

Muons in the final state are key signatures for physics analyses at Large Hadron Collider (LHC) on various processes, such as discovery of the Higgs boson, searches for new phenomena, as well as the measurements of Standard Model processes. Efficient triggers on muons and precise measurements of its performance are essential for physics analyses using muons. High rejection power against huge backgrounds at LHC is extremely important at online trigger stage. The ATLAS experiment employs a multi-level trigger architecture that selects the events in three sequential steps of increasing complexity and accuracy to cope with this challenging task. This paper reports about performance of the ATLAS muon trigger by using proton-proton collision\ndata at sqrt(s) = 8 TeV collected in year 2012.