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2011

Top quark forward-backward asymmetry from the $3-3-1$ model

Barreto, E. Ramirez, Coutinho, Y. A., Borges, J. Sá

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The forward-backward asymmetry $A_{FB}$ in top quark pair production, measured at the Tevatron, is probably related to the contribution of new particles.

The Tevatron result is more than a $2\sigma$ deviation from the standard model prediction and motivates the application of alternative models introducing new states.
However, as the standard model predictions for the total cross section $\sigma_{tt}$ and invariant mass distribution $M_{tt}$ for this process are in good agreement with experiments, any alternative model must reproduce these predictions.
These models can be placed into two categories: One introduces the s-channel exchange of new vector bosons with chiral couplings to the light quarks and to the top quark and another relies on the t-channel exchange of particles with large flavor-violating couplings in the quark sector.

Top quark forward-backward asymmetry from the $3-3-1$ model · Around

Built on

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Then

E. Ramirez Barreto, Y. A. Coutinho, J. Sá Borges, Nucl. Phys. B 810
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2009
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