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arXiv · 1401.5443

Top-quark forward-backward asymmetry from a color-octet t-channel resonance

Li Cheng·Alper Hayreter·German Valencia
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Abstract

We consider new physics contributions to the top-quark forward-backward asymmetry from a neutral $V^0_8$ or charged $V^+_8$ color-octet vector exchanged in the $t$-channel. We study the phenomenological constraints on these particles arising from the Tevatron and LHC7 measurements and compare them with those on their color singlet counterparts $Z^\prime$ and $W^\prime$. We find that the color octets fare better than the singlets in that they generate a lower $A_C$, a lower high-invariant mass cross-section at LHC7 and a lower same sign top-pair cross-section. However, they also generate a lower $A_{FB}$ than their color-singlet counterparts.

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Li Cheng, Alper Hayreter, German Valencia. 2014-01-30. Top-quark forward-backward asymmetry from a color-octet t-channel resonance. https://doi.org/10.1103/physrevd.89.095009

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