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Wigner and the groups in classifying elementary particles and nuclear states
EPJ Web of Conferences
The application of group-representations in nuclear and particle physics, as initiated by Wigner , is considered. The general classification of the elementary particles according to the representations of the inhomogenous Lorentz-group  is recalled. The role of the U(4) group is discussed, first in relation with the spin-isospin supermultiplets  both in nuclear and in particle physics, then as a dynamical group of the two-body systems in both disciplines. Finally the classification ofdoi:10.1051/epjconf/20147803002 fatcat:ybmhjyk6fnbp7jtmj6l2e7eayq