We consider vectorlike quarks in a leptophobic 221 model characterized by the gauge group $SU(2{)}_L\times SU(2{)}_2\times U(1{)}_X$, where the $SU(2{)}_2$ is leptophobic in nature. We discuss the pattern of mixing between Standard Model quarks and vectorlike quarks and how we prevent tree level flavor-changing interactions in the model. The model also predicts tauphilic scalars decaying mostly to tau leptons. We consider a typical signal of the model in the form of pair production of top-type vectorlike quarks which decays to the tauphilic scalars and a third generation quark. We analyze the resulting final state signal for the 13 TeV LHC, containing $\ge 3j(1b)+\ge 2\tau +\ge 1l$ and discuss the discovery prospects of such vectorlike quarks with nonstandard decay modes.

• Received 13 February 2019

DOI:https://doi.org/10.1103/PhysRevD.99.115002

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Published by the American Physical Society