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First Measurement of the Angular Coefficients of Drell-Yan e^ + e^ - Pairs in the Z Mass Region from pp over ¯ Collisions at sqrt s =1.96  TeV.

Author
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Abstract
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We report on the first measurement of the angular distributions of final state electrons in pp[over ¯]→γ^{*}/Z→e^{+}e^{-}+X events produced in the Z boson mass region at sqrt[s]=1.96  TeV. The data sample collected by the CDF II detector for this result corresponds to 2.1  fb^{-1} of integrated luminosity. The angular distributions are studied as a function of the transverse momentum of the electron-positron pair and show good agreement with the Lam-Tung relation, consistent with a spin-1 description of the gluon, and demonstrate that, at high values of the transverse momentum, Z bosons are produced via quark-antiquark annihilation and quark-gluon Compton processes.

Year of Publication
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1969
Journal
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Physical review letters
Volume
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106
Issue
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24
Number of Pages
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241801
Date Published
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2011 Jun 17
ISSN Number
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0031-9007
URL
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http://link.aps.org/abstract/PRL/v106/p241801
Short Title
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First Measurement of the Angular Coefficients of DrellYan e e Pa
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