## Aspects of the current algebra approach |

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Adler Adler-Weisberger calculation Adler-Weisberger sum rule algebra of currents amplitude anticommutation approximation assume assumption ators axial vector current B.W. Lee baryon Cabibbo changing axial current component continuum contribution coupling constant cross-sections current algebra approach current commutation relations current operators Dashen decay constant decay rate deduce defined denote difficulty divergenceless Elementary Particles equations finite Fubini and Furlan Gell-Mann Hamiltonian higher symmetry group infinite momentum infinite set internal symmetry isospin kaon Lagrangian Lee-Dashen-Gell-Mann procedure left hand side Letters 16 Lie algebra Lie group limit magnetic moments matrix elements measurable local operators method mutation relations Nambu neutron Nuovo Cimento obtain Okubo orbital angular momentum pa-p Phys Poincare group proton quantity quark model rela renormalization representation right hand side Schwinger term single particle space integrals spatial momentum strangeness changing axial take the matrix theory tion total cross sections Treiman vanish vector isovector current weak interaction Weisberger zero momentum zero pion mass