Measurement of the leptonic asymmetry in t¯t events produced in p¯p collisions at √s=1.96  TeV

We measure the asymmetry in the charge-weighted rapidity qyℓ of the lepton in semileptonic t¯t decays recorded with the CDF II detector using the full Tevatron Run II sample, corresponding to an integrated luminosity of 9.4  fb−1. A parametrization of the asymmetry as a function of qyℓ is used to co...

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Authors: 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
Format: Article
Publication date:2013
Country:España
Institution:Universidad de Cantabria (UC)
Repository:UCrea Repositorio Abierto de la Universidad de Cantabria
Language:English
OAI Identifier:oai:repositorio.unican.es:10902/28864
Online Access:https://hdl.handle.net/10902/28864
Access Level:Open access
Summary:We measure the asymmetry in the charge-weighted rapidity qyℓ of the lepton in semileptonic t¯t decays recorded with the CDF II detector using the full Tevatron Run II sample, corresponding to an integrated luminosity of 9.4  fb−1. A parametrization of the asymmetry as a function of qyℓ is used to correct for the finite acceptance of the detector and recover the production-level asymmetry. The result of AℓFB=0.094+0.032−0.029 is to be compared to the standard model next-to-leading-order prediction of AℓFB=0.038±0.003.

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