# 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

Abstract : We report on the first measurement of the angular distributions of final state electrons in $p\bar{p}\to \gamma^{*}/Z\to e^{+}e^{-}+X$ 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.
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-00598698
Contributor : Swarna Bassava <>
Submitted on : Tuesday, June 7, 2011 - 12:44:20 PM
Last modification on : Wednesday, May 27, 2020 - 7:20:03 PM

### Citation

T. Aaltonen, B. Alvarez Gonzalezv, S. Amerio, D. Amidei, A. Anastassov, et al.. 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. Physical Review Letters, American Physical Society, 2011, 106, pp.241801. ⟨10.1103/PhysRevLett.106.241801⟩. ⟨in2p3-00598698⟩

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