Forward-backward asymmetry of top quark in diquark models
High Energy Physics - Phenomenology
2014-11-20 v3 High Energy Physics - Experiment
Abstract
Motivated by the recent unexpected large forward-backward asymmetry (FBA) of the top quark observed by D and CDF at the Tevatron, we investigate a possible explanation for the anomaly within the framework of diquark models. Unlike other mechanisms induced by s-channel or t-channel, the top-quark pair production in the diquark models is dictated by the u-channel diagram. We find that the color-triplet diquark can generate the FBA of 20% when the constraint from the cross section of the top-quark pair production is taken into account.
Keywords
Cite
@article{arxiv.0911.4875,
title = {Forward-backward asymmetry of top quark in diquark models},
author = {Abdesslam Arhrib and Rachid Benbrik and Chuan-Hung Chen},
journal= {arXiv preprint arXiv:0911.4875},
year = {2014}
}
Comments
12 pages, 5 figures. Discussion and figures improved. Version accepted for publication in PRD