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Abstract
CDF recently reported an anomaly in the ${m}_{jj}$ distribution of dijet events produced in association with a $W$ boson. A single $u\ensuremath{-}t\ensuremath{-}V$ flavor-changing coupling can contribute to the ${m}_{jj}$ anomaly while being consistent with other resonance searches. Furthermore, it gives a potential explanation of the observed forward-backward asymmetry in top quark production.
Highlights
N The CDF collaboration recently released an analysis of Y O the mjj spectrum in a sample of lET jj events [1]
In previous work [7, 8], we pointed out the possibility that a gauge boson with flavor-changing u − t − V coupling could explain the AtF B asymmetry via the t-channel exchange of V
The Z′ is light but not constrained by prior experiment [8]. These two benchmark points are capable of producing a large AtF B while satisfying other bounds on top quark production
Summary
N The CDF collaboration recently released an analysis of Y O the mjj spectrum in a sample of lET jj events [1]. [7, 8], the AtF B result is explained by a u − t − V coupling, with V a new vector boson. This point has a mass that could explain the mjj anomaly and has the maximum coupling allowed consistent with UA2 bounds. Such a model produces an excess of about 160 events in a mass peak with 4.3 fb−1, to be compared with the excess of 256 ± 57 events observed at CDF [1]
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