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    Measurement of Dijet Angular Distributions and Search for Quark Compositeness

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    We have measured the dijet angular distribution in s\sqrt{s}=1.8 TeV ppˉp\bar{p} collisions using the D0 detector. Order αs3\alpha^{3}_{s} QCD predictions are in good agreement with the data. At 95% confidence the data exclude models of quark compositeness in which the contact interaction scale is below 2 TeV.Comment: 11 pages, Latex, 3 postscript figure
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