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Open Access item 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
E-ISSNmetadata.dc.identifier.doi = DOI:1079-7114
Appears in Collections:(IFCA) Artículos

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