Measurement of the Differential Cross Section dσ/d(cosθt) for Top-Quark Pair Production in p¯p Collisions at √s=1.96  TeV

We report a measurement of the differential cross section dσ/d(cosθt) for top-quark pair production as a function of the top-quark production angle in proton-antiproton collisions at √s=1.96  TeV. This measurement is performed using data collected with the CDF II detector at the Tevatron, correspond...

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Detalhes bibliográficos
Autores: Aaltonen, Timo Antero, Casal Laraña, Bruno, Cuevas Maestro, Francisco Javier, Gómez Gramuglio, Gervasio|||0000-0002-1077-6553, Palencia Cortezón, José Enrique, Ruiz Jimeno, Alberto|||0000-0002-3639-0368, Scodellaro, Luca|||0000-0002-4974-8330, Vilar Cortabitarte, Rocío|||0000-0003-2045-8054, Vizán García, Jesús Manuel|||0000-0002-6823-8854
Formato: artículo
Fecha de publicación:2013
País:España
Recursos:Universidad de Cantabria (UC)
Repositorio:UCrea Repositorio Abierto de la Universidad de Cantabria
Idioma:inglés
OAI Identifier:oai:repositorio.unican.es:10902/28863
Acesso em linha:https://hdl.handle.net/10902/28863
Access Level:acceso abierto
Descrição
Resumo:We report a measurement of the differential cross section dσ/d(cosθt) for top-quark pair production as a function of the top-quark production angle in proton-antiproton collisions at √s=1.96  TeV. This measurement is performed using data collected with the CDF II detector at the Tevatron, corresponding to an integrated luminosity of 9.4  fb−1. We employ the Legendre polynomials to characterize the shape of the differential cross section at the parton level. The observed Legendre coefficients are in good agreement with the prediction of the next-to-leading-order standard-model calculation, with the exception of an excess linear-term coefficient a1=0.40±0.12, compared to the standard-model prediction of a1=0.15+0.07−0.03.

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