Current Algebra in Two-Particle Bases and Single-Particle Inclusive Processes
Lay Nam Chang, Kazuo Fujikawa · Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields · 1972
We discuss several problems involved in the current-algebra sum rules derived by Suzuki and his collaborators. In particular we discuss the ambiguities related to soft-current insertion to the external lines. Alternative prescriptions to get similar sum rules are also discussed. An application of the sum rule to the $W$-production process is briefly discussed.