Representation mixing for SU3 and G2

Mukunda, N. ; Macfarlane, A. J. ; Sudarshan, E. C. G. (1965) Representation mixing for SU3 and G2 Physical Review, 138 (3B). B655-B666. ISSN 0031-899X

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A theory whose exact invariance with respect to SU3 is broken by interactions transforming like the hypercharge generator of SU3 is studied in perturbation theory. Physical particle states corresponding to unperturbed SU3 multiplets are obtained by mixing into these multiplets possible impurities corresponding to other SU3 multiplets, these impurities being as general as the perturbation allows. The effect of symmetry breaking on various physical quantities like masses and magnetic moments can then be obtained in terms of mixing parameters, and interesting formulas follow various restrictions of their values. Similar considerations applied to G2 show that many of the conclusions which made exact G2 invariance unattractive remain for approximate G2 invariance.

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Deposited On:06 Dec 2010 13:35
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