nucléonina
Nucleonina is a hypothetical particle that has been proposed in some theoretical frameworks of particle physics. It is conceived as a constituent of nucleons, which are protons and neutrons. The concept of nucleonina arises from attempts to describe the internal structure of nucleons at a deeper level than the quark model. While the Standard Model of particle physics describes protons and neutrons as being composed of quarks and gluons, some speculative theories explore the possibility of even more fundamental constituents.
The idea behind nucleonina is that quarks themselves might not be elementary but could be bound states