Measurement of the Inclusive Leptonic Asymmetry in Top-Quark Pairs that Decay to Two Charged Leptons at CDF

We measure the inclusive forward–backward asymmetry of the charged-lepton pseudorapidities from top-quark pairs produced in proton–antiproton collisions and decaying to final states that contain two charged leptons (electrons or muons). The data are collected with the Collider Detector at Fermilab a...

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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:2014
País:España
Recursos:Universidad de Cantabria (UC)
Repositorio:UCrea Repositorio Abierto de la Universidad de Cantabria
Idioma:inglés
OAI Identifier:oai:repositorio.unican.es:10902/13852
Acesso em linha:http://hdl.handle.net/10902/13852
Access Level:acceso abierto
Descrição
Resumo:We measure the inclusive forward–backward asymmetry of the charged-lepton pseudorapidities from top-quark pairs produced in proton–antiproton collisions and decaying to final states that contain two charged leptons (electrons or muons). The data are collected with the Collider Detector at Fermilab and correspond to an integrated luminosity of 9.1??fb-1. We measure the leptonic forward–backward asymmetry, AlFB, to be 0.072±0.060 and the leptonic pair forward–backward asymmetry, AllFB, to be 0.076±0.082. The measured values can be compared with the standard model predictions of AlFB=0.038±0.003 and AllFB=0.048±0.004, respectively. Additionally, we combine the AlFB result with a previous determination from a final state with a single lepton and hadronic jets and obtain AlFB=0.090+0.028-0.026.