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 Mini-reviewWeinberg like sum rules revisitedSergey S Afonin1,2 1 University of Bochum, Department of Physics and Astronomy, Theoretical Physics II, 150 Universitätsstrasse, 44780 Bochum, Germany 2 V. A. Fock Department of Theoretical Physics, St. Petersburg State University, 1 ul. Ulyanovskaya, 198504 St. Petersburg, Russia
PMC Physics A 2009, 3:1doi:10.1186/1754-0410-3-1
AbstractThe 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 give a historical survey and summarize the status of these sum rules analyzing their overall agreement with phenomenological Lagrangians, low-energy relations, parity doubling, hadron string models, and experimental data. PACS codes: 11.55.Hx, 11.30.Rd |
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