Theories of Particles of Arbitrary Spins
Theories of particles of spin higher than 0, ½, and 1 have been studied ever since Dirac wrote his famous equation for the case of spin ½, but until recently, such studies were only of academic interest. In addition, an interest in these theories was damped for those who believed in conventional field theory because they are unrenormalizable. Considerations involving higher spins are now felt to be of practical importance by followers of the S-matrix approach with the discovery of new higher spin resonances and also perhaps in the problem of the analytic continuation in spin of the S-matrix elements and the description of the Regge poles arising therefrom.
KeywordsLorentz Transformation Annihilation Operator Lorentz Group Feynman Rule Momentum Vector
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