The ATLAS Muon and Tau Trigger

[Muon] The ATLAS experiment at CERN's Large Hadron Collider (LHC) deploys a three-levels processing scheme for the trigger system. The level-1 muon trigger system gets its input from fast muon trigger detectors. Fast sector logic boards select muon candidates, which are passed via an interface board to the central trigger processor and then to the High Level Trigger (HLT). The muon HLT is purely software based and encompasses a level-2 (L2) trigger followed by an event filter (EF) for a staged trigger approach. It has access to the data of the precision muon detectors and other detector elements to refine the muon hypothesis. Trigger-specific algorithms were developed and are used for the L2 to increase processing speed for instance by making use of look-up tables and simpler algorithms, while the EF muon triggers mostly benefit from offline reconstruction software to obtain most precise determination of the track parameters. There are two algorithms with different approaches, namely inside-out and outside-in tracking, which was used in trigger with conditional-OR to obtain maximum efficiency with least processing time. This presentation summarizes these 3 years experiences in ATLAS muon trigger and reports about online performances for instance processing time and trigger rates as well as trigger efficiency, resolution, and other general performance. [Tau] As proton-proton collisions at the LHC near luminosities of 10^34 cm-2 s-1,the strategies for triggering have become more important than ever forphysics analyses. Simplistic single tau lepton triggers now suffer from severe rate limitation, despite ongoing improvements or the tau identification.The development of fast algorithms and the design of topological selectionsare the main challenges to allowing a large program of physics analysis. The tau triggers provide many opportunities to study new physics beyond theStandard Model, and to determine if the 125 GeV resonance discovered by theLHC couples to tau leptons as would a Standard Model Higgs boson. We present the status and performance of the hadronic tau trigger in ATLAS. We demonstrate that the ATLAS tau trigger performed remarkably well throughout 2012. One of the major challenges is to sustain high efficiencies in events with multiple interactions. To do this we introduced faster trackingmethods, multivariate selection techniques, and new topological criteria in the software trigger. Results from the full 2012 p-p data taking period will be shown. We present measurements of the trigger efficiency using Z->tau tau and W->tau nu events as the application to searches for tau tau resonances, such as the Higgs boson searches. We also outline the upgrade plan to 2015 for the 14(13) TeV LHC proton-proton collisions.