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

Author(s)
Gomez-Ceballos, Guillelmo; Goncharov, Maxim; Paus, Christoph M. E.
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Abstract
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[superscript −1]. We measure the leptonic forward–backward asymmetry, A[ℓ over FB], to be 0.072 ± 0.060 and the leptonic pair forward–backward asymmetry, A[ℓℓ over FB], to be 0.076 ± 0.082. The measured values can be compared with the standard model predictions of A[ℓ over FB] = 0.038 ± 0.003 and A[ℓℓ over FB] =0.048 ± 0.004, respectively. Additionally, we combine the A[ℓ over FB] result with a previous determination from a final state with a single lepton and hadronic jets and obtain A[ℓ over FB] = 0.090[+0.028 over −0.026].
Date issued
2014-07
URI
http://hdl.handle.net/1721.1/91201
Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Aaltonen, T., S. Amerio, D. Amidei, A. Anastassov, A. Annovi, J. Antos, G. Apollinari, et al. “Measurement of the Inclusive Leptonic Asymmetry in Top-Quark Pairs That Decay to Two Charged Leptons at CDF.” Physical Review Letters 113, no. 4 (July 2014). © 2014 American Physical Society
Version: Final published version
ISSN
0031-9007
1079-7114

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