N is the number of fermion species in the theory.

As such, they do not explain why there are three generations of fermions.

Since the occupation number for each fermion is 0 or 1, there are 2 possible basis states.

These changes lead to two important features in the optical response of heavy fermions.

The colliding fermions do not need to be the same type.

The first fermion to be discovered, and the one we know the most about, is the electron.

Such a mechanism is not available for helium-3 atoms, which are fermions.

They play an important role in the physical description of fermions such as the electron.

The number of fermions, however, is conserved in this case.

Fermions are particles that join together to make up all "matter" we see.

Sometimes it even changes the identity of the fermions.

Most fermions will decay by a weak interaction over time.

In contrast, two fermions cannot occupy the same quantum space.

Fermions have properties, such as charge and mass, which can be seen in everyday life.

Fermions are the basic building blocks of all matter.

Those left-over fermions would have become the matter we see today in the universe around us.

In other words, a fermion needs to be rotated 720 before returning to its original state.

Fermions are really small and do not weigh much.

Two identical fermions cannot be in the same place at the same time.

Fermions, on the other hand, remain confined to a given aeon.

They are a composite fermion and hence have an associated magnetic moment.

It is similar to the Dirac equation for spin-1/2 fermions.

There are 12 different types of fermions (not including antimatter.

Essentially, you can't have more than one fermion in the same place at the same time.

A fermion needed two full rotations, 720 degrees, to come back into phase.