A unified, flavor symmetric explanation for the t-tbar asymmetry and Wjj excess at CDF

Abstract

We present a simple, perturbative, and renormalizable model with a flavor symmetry which can explain both the t-tbar forward-backward asymmetry and the bump feature present in the dijet mass distribution of the W+jj sample in the range 120-160 GeV that was recently reported by the CDF collaboration. The flavor symmetry not only ensures the flavor/CP safety of the model, but also relates the two anomalies unambiguously. It predicts a comparable forward-backward asymmetry in c-cbar. The forward-backward asymmetry in b-bar is, however, small. A bump in the dijet mass distribution in Z+jj sample is also predicted but with a suppressed cross-section.

minor changes to text, references added, version to be published in PRD

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• What the Tevatron Found?
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• Anomaly Puzzle, Curved-Spacetime Spinor Hamiltonian, and String Phenomenology
• LHC Test of CDF $Wjj$ anomaly