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

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CollaborationWith : Clark, Allan Geoffrey / Lister, Alison / Wu, Xin
Published in Physical Review Letters. 2011, vol. 106, no. 24, p. 241801
Abstract We report on the first measurement of the angular distributions of final state electrons in pp→γ∗/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-antiquark annihilation and quark-gluon Compton processes.
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GARCIA NAVARRO, Jose Enrique. First Measurement of the Angular Coefficients of Drell-Yan e+e Pairs in the Z Mass Region from pp Collisions at √s=1.96  TeV. In: Physical Review Letters, 2011, vol. 106, n° 24, p. 241801. https://archive-ouverte.unige.ch/unige:38672

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Deposited on : 2014-07-15

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