Overview of the ATLAS Trigger and highlights on the Tau Trigger

por Pilar Casado (IFAE)

viernes 30 nov. 2007 12:00 → 13:00 Europe/Madrid

Sala Seminarios IFIC (Edf. Institutos de Investigación)

The ATLAS trigger is splitted into three levels: the first level trigger (LVL1), and the second (LVL2) and third level (Event Filter, EF) triggers. The LVL1 trigger is hardware based whereas the LVL2 and EF (High Level Triggers, HLT) are software based triggers. In the case of the Tau Trigger, the LVL1 identifies a narrow jet in the calorimeter, while the HLT triggers select tau candidates analysing clusters and tracks reconstructed in the inner detector. In this talk, a summary of the ATLAS Trigger is presented and the algorithms and performance of the Tau Trigger are reviewed. Different luminosity and detector occupancy conditions are considered. The Monte Carlo samples of signal events analysed include taus from W and Z decays as well as taus produced in Higgs decays or in SUSY processes.