Partial waves and large NC resonance sum rules
Z. H. Guo, J. J. Sanz Cillero, H. Q. Zheng
Abstract
Using 1/NC expansion and dispersion theory techniques, without relying on any explicit resonance lagrangian, we generalize the KSRF relation beyond the leading chiral order. Two sum rules for the low energy constants L2, L3 and a new relation between resonance couplings are derived. A rather detailed examination to the new relation is also given.
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