First measurement of the angular coefficients of Drell-Yan e + e − pairs in the Z mass region from p ¯ p collisions at √ s = 1.96 TeV

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URI: https://hdl.handle.net/10902/28548
ISSN: 0031-9007
ISSN: 1079-7114
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Autoría
Aaltonen, Timo Antero; Álvarez González, Bárbara; Casal Laraña, Bruno; Cuevas Maestro, Francisco Javier; Gómez Gramuglio, GervasioAutoridad Unican; Palencia Cortezón, José Enrique; Rodrigo Anoro, TeresaAutoridad Unican; Ruiz Jimeno, AlbertoAutoridad Unican; Scodellaro, LucaAutoridad Unican; Vila Álvarez, Iván Autoridad Unican; Vilar Cortabitarte, RocíoAutoridad Unican; Vizán García, Jesús ManuelAutoridad Unican
Fecha
2011-06
Derechos
© 2011 American Physical Society
Publicado en
Physical Review Letters, 2011, 106(24), 241801
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American Physical Society
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Resumen/Abstract
We report on the first measurement of the angular distributions of final state electrons in p¯p???/Z?e+e?+X events produced in the Z boson mass region at ?s=1.96TeV. 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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