Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2011-03-10
Phys.Rev.D84:035012,2011
Physics
High Energy Physics
High Energy Physics - Phenomenology
25 pages, 4 figures, note added
Scientific paper
10.1103/PhysRevD.84.035012
The forward-backward asymmetry $A_{FB}^{t\bar t}$ in top quark production at the Tevatron has been observed to be anomalously large by both CDF and D0. It has been suggested that a model with a $W'$ coupling to $td$ and $ub$ might explain this anomaly, and other anomalies in $B$ mesons. Single-top-quark production in this model is large, and arguably in conflict with Tevatron measurements. However the model might still be viable if $A_{FB}^{t\bar t}$ is somewhat smaller than its current measured central value. We show that even with smaller couplings, the model can be discovered (or strongly excluded) at the LHC using the 2010 data sets. We find that a suitable charge-asymmetry measurement is a powerful tool that can be used to constrain this and other sources of anomalous single-top production, and perhaps other new high-energy charge-asymmetric processes.
Craig Nathaniel
Kilic Can
Strassler Matthew J.
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