Leptonic asymmetry in ttbar production at CDF

TL;DR

This paper reports a measurement of leptonic asymmetry in top-antitop quark decays at CDF, finding a value higher than the Standard Model prediction, using the full Tevatron Run II dataset.

Contribution

The study provides the first measurement of leptonic asymmetry in ttbar production at CDF with the complete dataset, comparing results to NLO theoretical predictions.

Findings

Measured asymmetry A_FB^lep = 0.094^{+0.032}_{-0.029}

Results are higher than the NLO prediction of 0.038

Analysis uses the full Tevatron Run II dataset

Abstract

The leptonic asymmetry in semileptonic ttbar decays is measured with the CDF detector using the full Tevatron Run II dataset, which corresponds to 9.4 fb^-1 of integrated luminosity. The measured asymmetry is extrapolated to the full kinematic range and the measured value of A_FB^lep = 0.094^+0.032_-0.029 is compared to the NLO prediction A_FB^lep = 0.038 +/- 0.003.