Multiparticle Sum Rules
Published in Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields • Feb 15, 1972
NobleIDNI3P19W54R53S17
Authors:
Steven Weinberg
Abstract
Sum rules are derived by applying soft-pion theorems to the dispersion relations for the reactions $\ensuremath{\pi}+I\ensuremath{\rightarrow}\ensuremath{\pi}+F$, $I\ensuremath{\rightarrow}2\ensuremath{\pi}+F$, $2\ensuremath{\pi}+I\ensuremath{\rightarrow}F$, with $I$ and $F$ general multiparticle st...
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