Precise Relations between the Spectra of Vector and Axial-Vector Mesons
Abstract
Two sum rules are derived, relating moments of the spectral functions of the vector and axial-vector currents. If it is assumed that the ρ and A1 mesons dominate these moments, then their masses must be in the ratio mA1mρ=2, in very good agreement with experiment.
- Publication:
-
Physical Review Letters
- Pub Date:
- March 1967
- DOI:
- 10.1103/PhysRevLett.18.507
- Bibcode:
- 1967PhRvL..18..507W