Forward-backward asymmetry of the top quark in diquark models
Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D, Particles, fields, gravitation, and cosmologyPublished 26 August 2010Open access
Abdesslam Arhrib, Rachid Benbrik, Chuan Hung Chen
Citations91
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Abstract
Motivated by the recent unexpected large forward-backward asymmetry (FBA) of\nthe top quark observed by D$\\O$ and CDF at the Tevatron, we investigate a\npossible explanation for the anomaly within the framework of diquark models.\nUnlike other mechanisms induced by s-channel or t-channel, the top-quark pair\nproduction in the diquark models is dictated by the u-channel diagram. We find\nthat the color-triplet diquark can generate the FBA of 20% when the constraint\nfrom the cross section of the top-quark pair production is taken into account.\n
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