Cesiums
Cesiums are a hypothetical class of exotic particles that have not been observed experimentally. The concept of cesiums arises in certain theoretical physics frameworks, particularly in some extensions of the Standard Model of particle physics. These theories propose the existence of new fundamental particles beyond those currently known, and "cesium" is a designation given to one such hypothetical particle within these models.
The properties of cesiums would depend entirely on the specific theoretical model in which they are proposed.