Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2011-03-24
Phys.Rev.D83:114039,2011
Physics
High Energy Physics
High Energy Physics - Phenomenology
21 pages, 7 figures
Scientific paper
10.1103/PhysRevD.83.114039
Motivated by the persistence of a large measured top quark forward-backward asymmetry at the Tevatron, we examine a model of non-Abelian flavor gauge symmetry. The exchange of the gauge bosons in the $t$-channel can give a large asymmetry due to the forward Rutherford scattering peak. We address generic constraints on non-Abelian $t$-channel physics models including flavor diagonal resonances and potentially dangerous contributions to inclusive top pair cross sections. We caution on the general difficulty of comparing theoretical predictions for top quark signals to the existing experimental results due to potentially important acceptance effects. The first signature at the Large Hadron Collider can be a large inclusive top pair cross section, or like-sign dilepton events, although the latter signal is much smaller than in Abelian models. Deviations of the invariant mass distributions at the LHC will also be promising signatures. A more direct consistency check of the Tevatron asymmetry through the LHC asymmetry is more likely to be relevant at a later stage.
Jung Sunghoon
Pierce Aaron
Wells James Daniel
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