First Measurement of the Angular Coefficients of Drell-Yan $e^{+}e^{-}$ pairs in the Z Mass Region from $p\bar{p}$ Collisions at $\sqrt{s}$ = 1.96 TeV

We report on the first measurement of the angular distributions of final state electrons in $p \overset{ˉ}{p} \to γ^{*} / Z \to e^{+} e^{-} + X$ 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 anti-quark annihilation and quark-gluon Compton processes.

First Measurement of the Angular Coefficients of Drell-Yan $e^{+} e^{-}$ pairs in the Z Mass Region from $p \overset{ˉ}{p}$ Collisions at $\sqrt{s}$ = 1.96 TeV

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First Measurement of the Angular Coefficients of Drell-Yan $e^{+} e^{-}$ pairs in the Z Mass Region from $p \overset{ˉ}{p}$ Collisions at $\sqrt{s}$ = 1.96 TeV

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First Measurement of the Angular Coefficients of Drell-Yan e+e−e+e− pairs in the Z Mass Region from ppˉppˉ​ Collisions at ss​ = 1.96 TeV

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First Measurement of the Angular Coefficients of Drell-Yan e+e−e+e− pairs in the Z Mass Region from ppˉppˉ​ Collisions at ss​ = 1.96 TeV

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First Measurement of the Angular Coefficients of Drell-Yan $e^{+} e^{-}$ pairs in the Z Mass Region from $p \overset{ˉ}{p}$ Collisions at $\sqrt{s}$ = 1.96 TeV

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First Measurement of the Angular Coefficients of Drell-Yan $e^{+} e^{-}$ pairs in the Z Mass Region from $p \overset{ˉ}{p}$ Collisions at $\sqrt{s}$ = 1.96 TeV

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AI智能校验