Motivated by CDF Collaboration recent measurements on di-jet invariant mass spectrum, where di-jet is associated with charged leptons ($e/\mu$) and missing energy, we reexamined the previous proposed massive color-octet axial-vectorlike boson $Z_c$. Our simulation showed that the di-jet bump around 120–160 GeV can be induced by $Z_c$ with effective coupling $g_{Z_{c}q\overline{q}}=0.2g_s$ ($q$ represents the quark other than top and $g_s$ is the strong coupling constant). Moreover our numerical investigation indicated that the top quark forward-backward asymmetry $A_{\mathrm{FB}}^t$ can be reproduced without distorting shape of differential cross section $d\sigma /d{M}_{t\overline{t}}$, provided that the $Z_c$ and top quark coupling is appropriately chosen ($g_{Z_{c}t\overline{t}}\simeq 4.5g_{Z_{c}q\overline{q}}$). Our results also showed that the theoretical $A_{\mathrm{FB}}^t$ as functions of $\Delta y$ and $M_{t\overline{t}}$ can be consistent with data within $1\sigma$ and $1.8\sigma$, respectively.

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