Triggers for displaced decays of long-lived neutral particles in the ATLAS detector

Abstract

A set of three dedicated triggers designed to detect long-lived neutral particles decaying throughout the ATLAS detector to a pair of hadronic jets is described. The efficiencies of the triggers for selecting displaced decays as a function of the decay position are presented for simulated events. The effect of pile-up interactions on the trigger efficiencies and the dependence of the trigger rate on instantaneous luminosity during the 2012 data-taking period at the LHC are discussed.

19 pages plus author list (39 pages total), 16 figures, 4 tables, submitted to JINST, revision corresponds to published version. All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/TRIG-2012-02

References in corpus (7)

• Parton distributions for the LHC
• Echoes of a Hidden Valley at Hadron Colliders
• Performance of the ATLAS Trigger System in 2010
• Discovering the Higgs Through Highly-Displaced Vertices
• Parton Distributions for LHC
• Possible Effects of a Hidden Valley on Supersymmetric Phenomenology
• Search for a light Higgs boson decaying to long-lived weakly-interacting particles in proton-proton collisions at sqrt(s) = 7 TeV with the ATLAS detector

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