Comments are presented on the work of Gulrsey on the" Group Structure of Elementary
Particles." These concern the relationships of spin and iso-spin and the reasonableness of …

I) epartme, df,./Physics, llosto~ University-Boston, Mass.(ricevuto il 6 Agosto 1965) l) uri~ lg
the last year, considerable attention has been given to the possibility of combining Lorentz …

The purpose of this note is to present a group which contains the Lorentz group and
accounts for other quantum numbers of strong interactions. Up to now the internal symmetry …

An earlier proposal of the author for the incorporation of isotopic spin into the foundations of
the theory of spin ½ particles, based upon a consideration of the group-space of the proper …

OW Greenberg, Coupling of internal and spacetime symmetries, preprint (1964); R. Acharya,
MY Han, ME Mayer, HJ Schnitzer and ECG Sudarshan, Concerning space-time and …

As the number of hadronshas increased, at-tempts have multiplied to enlarge the under-
lying group structure governing the strong interactions of these particles. In view of the …

The unitary irreducible representations of the inhomogeneous, proper Lorentz group are
determined, using a prescription given by Wigner, with special emphasis on the case of zero …

=—6~ vpyvvPP~ and the tensor (sL'~ v sE p vppppp 5p~ devised by Calogero However, if
now some interaction is envisaged, the above considerations must be further ap-plied to …

Although recent progress in the theory of elementary particles, has gained brilliant success
on one hand, the essential limitation of the theory itself seems to have become clear …

A symmetry scheme is proposed for the leptons, with (μ+,∨, e−) as the fundamental vector in
accordance with the original Konopinsky-Mahmoud assignments. A representation of R (3) …