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Measurement of dijet angular distributions at sqrt{s}=1.96TeV and searches for quark compositeness and extra spatial dimensions

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Published
Article number191803
<mark>Journal publication date</mark>5/11/2009
<mark>Journal</mark>Physical Review Letters
Issue number19
Volume103
Number of pages7
<mark>State</mark>Published
<mark>Original language</mark>English

Abstract

We present the first measurement of dijet angular distributions in ppbar collisions at sqrt{s}=1.96TeV at the Fermilab Tevatron Collider. The measurement is based on a dataset corresponding to an integrated luminosity of up to 0.7fb-1 collected with the D0 detector. Dijet angular distributions have been measured over a range of dijet masses, from 0.25TeV to above 1.1TeV. The data are in good agreement with the predictions of perturbative QCD and are used to constrain new physics models including quark compositeness, large extra dimensions, and TeV-1 scale extra dimensions. For all models we set the most stringent direct limits to date.

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© 2009 The American Physical Society

7 pages with 1 figure and 1 table; updated to reflect published version