FiniteWidth Corrections to the VectorMesonDominance Prediction for ρ>e^{+}e^{}
Abstract
Finitewidth corrections based on a generalized effective range formula for pionpion scattering modify by a nonnegligible amount the wellknown relation between Γ (ρ>e^{+}e^{}) and Γ (ρ>ππ) derived on the basis of vectormeson dominance. We also present a new currentalgebra prediction for the shape and magnitude of σ (e^{+}e^{}>π^{+}π^{}) and estimate the ρmeson contribution to the Schwinger term.
 Publication:

Physical Review Letters
 Pub Date:
 July 1968
 DOI:
 10.1103/PhysRevLett.21.244
 Bibcode:
 1968PhRvL..21..244G