Showing papers by "David Malon published in 2009"

Expected performance of the ATLAS experiment - detector, trigger and physics

Abstract: A detailed study is presented of the expected performance of the ATLAS detector. The reconstruction of tracks, leptons, photons, missing energy and jets is investigated, together with the performance of b-tagging and the trigger. The physics potential for a variety of interesting physics processes, within the Standard Model and beyond, is examined. The study comprises a series of notes based on simulations of the detector and physics processes, with particular emphasis given to the data expected from the first years of operation of the LHC at CERN.

Triggering on Long-Lived Neutral Particles in the ATLAS Detector

Abstract: Neutral particles with long decay paths that decay to many-particle final states represent, from an experimental point of view, a challenge both for the trigger and for the reconstruction capabilities of the ATLAS apparatus. The Hidden Valley scenario serves as an excellent setting for the purpose of exploring the challenges to the trigger posed by long-lived particles.

The event data store and I/O framework for the ATLAS experiment at the Large Hadron Collider

Abstract: The ATLAS experiment at the Large Hadron Collider, a collaboration of approximately 2600 particle physicists worldwide, will soon produce tens of petabytes of data annually, with an equivalent amount of simulated data. Even in advance of data taking, ATLAS has already accumulated many petabytes of event data from detector commissioning activities and simulation. This paper provides an overview of the design and implementation of the scientific data store that hosts ATLAS event data, and describes how the store is populated, organized, and typically accessed. Aspects of the event I/O framework and supporting infrastructure are also described. The paper further discusses some of the challenges that must be addressed for a scientific data store of this scope, scale, and complexity.