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T-Space at The University of Toronto Libraries >
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Please use this identifier to cite or link to this item: http://hdl.handle.net/1807/31718

Title: Search for Dijet Resonances in sqrt(s)=7 TeV Proton-Proton Collisions with the ATLAS Detector at the LHC
Authors: Cheung, Sing Leung
Advisor: Savard, Pierre
Department: Physics
Keywords: Dijet
Exotics
Heavy resonances
Test statistics
Excited quark
Bayesian treatment
Issue Date: 5-Jan-2012
Abstract: A search for new heavy resonances in two-jet final states is described in this thesis. The data were collected by the ATLAS detector proton-proton collisions at sqrt(s) = 7 TeV and correspond to a time-integrated luminosity of 6.1 pb−1. The background-only hypothesis was tested on the observed data using BumpHunter test statistic. Consistency was found between the observed data and the background-only prediction. No resonant features were observed. A Bayesian approach using binned maximum likelihood was used to set upper limits on the product of cross section and detector acceptance for excited-quark (q*) production as a function of q* mass. At 95% credibility level (CL), the q* mass in the interval of 0.50 TeV < mq* < 1.62 TeV is excluded, extending the reach of previous experiments.
URI: http://hdl.handle.net/1807/31718
Appears in Collections:Doctoral

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