Axigluon as Possible Explanation for $p\bar{p} \to t\bar{t}$ Forward-Backward Asymmetry

TL;DR

This paper proposes an axigluon-based flavor-nonuniversal chiral color model to explain the observed forward-backward asymmetry in top-antitop quark production, predicting a distinctive asymmetry pattern as a function of invariant mass.

Contribution

It introduces a novel chiral color model with an axigluon that aligns with experimental data and predicts unique asymmetry behavior to distinguish it from other theories.

Findings

Data are consistent with axigluon exchange within 1σ

Model predicts a rise and fall pattern in asymmetry versus invariant mass

Further model aspects are discussed for future testing

Abstract

A flavor-nonuniversal chiral color model is introduced. It is used for comparison to the recent data on $\bar{p} p \to \bar{t} t$. We concluded that the data are consistent with interpretation as an axigluon exchange within 1$\sigma$ and a unique rise and fall behavior is predicated with regard to the asymmetry $A^t_{FB}$ as a function of $t \bar{t}$ invariant mass, which can distinguish our model from others before one discovers the axigluon resonance. Further aspects of the model are discussed.