Fermion

For example, according to the spin-statistics theorem in relativistic quantum field theory, particles with integer spin are bosons.

In addition to the spin characteristic, fermions have another specific property: they possess conserved baryon or lepton quantum numbers.

[1] As a consequence of the Pauli exclusion principle, only one fermion can occupy a particular quantum state at a given time.

Composite particles (such as hadrons, nuclei, and atoms) can be bosons or fermions depending on their constituents.

At proximity, where spatial structure begins to be important, a composite particle (or system) behaves according to its constituent makeup.

The quasiparticles of the fractional quantum Hall effect are also known as composite fermions; they consist of electrons with an even number of quantized vortices attached to them.