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On the structure of two-point Green-functions at next-to-leading order in 1/Nc

J. J. Sanz-Cillero
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Abstract

The structure of the two-point QCD Green-functions is studied in this note in the limit of large number of colours. Their general form at next-to-leading order in 1/Nc is derived keeping the infinite resonance summation and without relying on a particular realization of the hadronic action. It is found that the contributions from chiral operators without resonance fields of order p^4 or higher are irrelevant for the computation of the correlators and, hence, they can be dropped at the beginning of the calculation. The possibility of a more general cancelation of these local terms at the level of the generating functional is discussed.

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J. J. Sanz-Cillero. 2007-02-21. On the structure of two-point Green-functions at next-to-leading order in 1/Nc. https://doi.org/10.1016/j.physletb.2007.03.017

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