QCD physics in Atlas at the large hadron collider.
The Large Hadron Collider (LHC) is a proton-proton collider with a 14 TeV center of mass energy. The design luminosity is 10{sup 34} cm{sup -1}s{sup -1} with beam collisions separated by 25 ns. The initial operation for physics will take place at a luminosity of 10{sup 33}cm{sup -1}s{sup -1} and it is expected that the integrated luminosity delivered in the first year will be 10 fb{sup -1}. This integrated luminosity will result in very large event samples for most processes, for example: {approx}10{sup 8} leptonic W decays, 10{sup 4} {gamma}'s with E{sub t} > 500GeV and 10{sup 4} jets with E{sub t} > 1TeV. As a result of the high statistics event samples, the understanding of most QCD processes at 14TeV will be systematics limited after the first year of running. The Atlas detector [1] is a general purpose detector designed to be sensitive to the many physics processes which are expected at the LHC. It contains high performance tracking using silicon detectors and a transition radiation tracker in a 2 Tesla solenoidal magnetic field, a high resolution electromagnetic calorimeter based on lead-liquid argon, a hadron calorimeter based on steel-scintillator and Cu/W-liquid argon, and a large instrumented air-core toroid magnet system for muon measurement. The basic performance characteristics of these systems are given in Table 1.
- Research Organization:
- Argonne National Lab., IL (US)
- Sponsoring Organization:
- US Department of Energy (US)
- DOE Contract Number:
- W-31-109-ENG-38
- OSTI ID:
- 803881
- Report Number(s):
- ANL/HEP/CP-108810; ANL-HEP-CP-02-083; TRN: US200316%%365
- Resource Relation:
- Conference: 31st International Conference on High Energy Physics, Amsterdam (NL), 07/24/2002--07/31/2002; Other Information: PBD: 7 Oct 2002; PBD: 7 Oct 2002
- Country of Publication:
- United States
- Language:
- English
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