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Search for quark contact interactions in dijet angular distributions in pp collisions at root s=7 TeV measured with the ATLAS detector

Research output: Contribution to journalJournal article

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  • ATLAS Collaboration
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<mark>Journal publication date</mark>2011
<mark>Journal</mark>Physics Letters B
Issue number4-5
Volume694
Number of pages19
Pages (from-to)327-345
<mark>State</mark>Published
<mark>Original language</mark>English

Abstract

Dijet angular distributions from the first LHC pp collisions at center-of-mass energy root s = 7 TeV have been measured with the ATLAS detector. The dataset used for this analysis represents an integrated luminosity of 3.1 pb(-1). Dijet chi distributions and centrality ratios have been measured up to dijet masses of 2.8 TeV, and found to be in good agreement with Standard Model predictions. Analysis of the chi distributions excludes quark contact interactions with a compositeness scale Lambda below 3.4 TeV, at 95% confidence level, significantly exceeding previous limits.