New signals for vector-like down-type quark in U(1) of $$E_6$$
New signals for vector-like down-type quark in U(1) of $$E_6$$
We consider the pair production of vector-like down-type quarks in an $$E_6$$ motivated model, where each of the produced down-type vector-like quark decays into an ordinary Standard Model light quark and a singlet scalar. Both the vector-like quark and the singlet scalar appear naturally in the $$E_6$$ model with masses …