Large hadron collider signatures of exotic vector-like quarks within the 2-Higgs doublet model type-II

Abstract We study the decay of the exotic Vector-Like Quarks (VLQs) X and Y , with 5/3 and −4/3 units of electric charge, respectively, within the 2-Higgs Doublet Model (2HDM). Building on our previous studies of Vector-Like Top and Bottom quarks, we now investigate the characteristics of X and Y in the alignment limit of a Type-II Yukawa structure and show that, in the framework of such a 2HDM, one can have large non-Standard Model (SM) decay rates of the X and Y states. Our analysis focuses on their potential detection at the Large hadron collider, based on their pair production followed by a variety of both SM and non-SM decay patterns. In order to distinguish between doublet and triplet representations of the VLQs X and Y , we uncover specific signatures that can provide insights into this particular architecture of Beyond the SM physics.