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Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/46044
Title: First Measurement of the Angular Coefficients of Drell-Yan e+e- Pairs in the Z Mass Region from pp̅ Collisions at √s=1.96  TeV
Authors: Aaltonen, T.; Álvarez González, B.; Casal, Bruno; Cuevas, Javier; Gómez, G.; Palencia, Enrique; Rodrigo, Teresa; Ruiz Jimeno, Alberto; Scodellaro, Luca; Vila, Iván; Vilar, Rocío
Issue Date: Jun-2011
Publisher: American Physical Society
Citation: Physical Review Letters 106(24): 241801 (2011)
Abstract: We report on the first measurement of the angular distributions of final state electrons in pp̅ →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.
Description: 8 páginas, 3 figuras, 1 tabla.-- PACS numbers: 13.38.Dg, 12.38.Bx, 13.85.Qk, 14.70.Hp.-- CDF Collaboration: et al.
Publisher version (URL): http://dx.doi.org/10.1103/PhysRevLett.106.241801
URI: http://hdl.handle.net/10261/46044
ISSN: 0031-9007
DOI: 10.1103/PhysRevLett.106.241801
E-ISSN: 1079-7114
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