Correlation of top asymmetries: loop versus tree origins

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We study the correlation of top asymmetries that are sensitive to the different origin of (a new contribution to) the total asymmetry: loop- or tree-level origins.

• We find that both the size and sign of the correlation between total and $t\bar{t}j$ inclusive asymmetries are inherently different depending on the origin.
• We demonstrate the correlation by using the color-singlet $Z^\prime$ and the pure axigluon taken as representative models of loop- and tree-induced total asymmetries.
• We calculate the next-to-leading order QCD corrections to the $Z^\prime$ and perform Monte-Carlo event generation.