Prospects to search for E6 isosinglet quarks in ATLAS

Details Prospects to search for E6 isosinglet quarks in ATLAS Prospects to search for E6 isosinglet quarks in ATLAS

2006-03-02

arxiv.org/abs/hep-ex/0603005v2

Eur.Phys.J. C49 (2007) 613-622

Physics

High Energy Physics

High Energy Physics - Experiment

11 pages, short version of an ATLAS-PHYS-PUB-05-021 intended for publication. new version uploaded to appear as a scientific n

Scientific paper

10.1140/epjc/s10052-006-0147-9

We consider pair production of new down-type isosinglet quarks originating from E_{6}, which is the favorite gauge symmetry group in superstring inspired GUT models. The study concentrates on the possibility of observing the pair production of the lightest of the new quarks, D, in the ATLAS detector at the forthcoming LHC accelerator, in the channel D\bar{D}\to ZjZj . Both signal and background events are studied using tree level event generators based on Monte Carlo techniques. The detector effects are taken into account using the ATLAS fast simulation tool, ATLFAST. It is shown that ATLAS can observe the D quark within the first year of low luminosity LHC operation if its mass is less than 650 GeV. For the case of two years of full luminosity running, 1 TeV can be reached with about three sigma significance.

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