Download or read book First Measurement of the Angular Coefficients of Drell-Yan $e^{+}e^{-}$ Pairs in the Z Mass Region from $p\bar{p}$ Collisions at $\sqrt{s}$ written by and published by . This book was released on 2011 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: We report on the first measurement of the angular distributions of final state electrons in p{bar p} → [gamma]*/Z → e+e− + X events produced in the Z boson mass region at √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.