Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2010-09-26
Phys.Lett.B694:327-345,2011
Physics
High Energy Physics
High Energy Physics - Experiment
7 pages + authorlist (total 22), 3 figures
Scientific paper
10.1016/j.physletb.2010.10.021
Dijet angular distributions from the first LHC pp collisions at center-of-mass energy sqrt(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.
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