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Fermion

Fermions are particles with half-integer spin, such as 1/2, 3/2, 5/2. The Pauli exclusion principle states that two or more identical fermions cannot occupy the same quantum state within a quantum system simultaneously.

 


Elementary particles

The elementary particles quarks and leptons are fermions.

F E R M I O N S
Q u a r k s
u
up
c
charm
t
top
d
down
s
strange
b
bottum
L e p t o n s
e
elektron
µ
muon
τ
tau
νe
e neutrino
νµ
µ neutrino
ντ
τ neutrino

 


Hadrons

The composite particles baryons are also fermions, because they have a half-integer spin. They are hadrons because they consist of quarks.

F E R M I O N S
B a r y o n s
p
proton
n
neutron
···

 


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