1) Quark 2) Strange quark 
(from the article `supersymmetry`) ...a doubling of the number of the known particles. For example, fermions such as electrons and quarks should have bosonic supersymmetric partners, ... ...particles all have supersymmetric counterparts with different spin. Thus, the leptons and quarks with spin 12 have supersymmetric partners, dubbed ....
The hypothetical spin-zero superpartner of the quark.
The hypothetical spin-zero superpartner of the quark.