Nonstandard signatures of vectorlike quarks in a leptophobic 221 model

Abstract

We consider vectorlike quarks in a leptophobic 221 model characterized by the gauge group 𝑆⁢𝑈⁢(2)𝐿×𝑆⁢𝑈⁢(2)2×𝑈⁢(1)𝑋, where the 𝑆⁢𝑈⁢(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 ≥3⁢𝑗⁡(1⁢𝑏)+≥2⁢𝜏+≥1⁢𝑙 and discuss the discovery prospects of such vectorlike quarks with nonstandard decay modes.