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.

Composite fermions, such as protons and neutrons, are the key building blocks of everyday matter.

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.