Measurement of the differential cross section dσ/d(cosθt) for top-quark pair production in pp̄ 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, correspondi...

Descripción completa

Detalles Bibliográficos
Autores: Aaltonen, T., Casal, Bruno, Cuevas, Javier, Gómez, Gervasio, Palencia, Enrique, Ruiz Jimeno, Alberto, Scodellaro, Luca, Vilar Cortabitarte, R., Vizán, J., CDF Collaboration
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2013
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/109338
Acceso en línea:http://hdl.handle.net/10261/109338
Access Level:acceso abierto
Descripción
Sumario: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. © 2013 American Physical Society.

Similares en LA Referencia