Weinberg like sum rules revisited
Abstract
Description
The generalized Weinberg sum rules containing the difference of isovector vector and axial-vector spectral functions saturated by both finite and infinite number of narrow resonances are considered. We summarize the status of these sum rules and analyze their overall agreement with phenomenological Lagrangians, low-energy relations, parity doubling, hadron string models, and experimental data.
31 pages, noticed misprints are corrected, references are added, and other minor corrections are made
31 pages, noticed misprints are corrected, references are added, and other minor corrections are made