|Definition:|| particle with integer spin quantum number, i.e. 0, 1, 2, ...|
NOTE 1 Bosons undergo Bose-Einstein statistics and do not obey the Pauli exclusion principle (see fermion).
NOTE 2 Bosons are e.g the photon and all particles constituted from an even number of fermions (e.g. pion, helium nucleus 4He).