Exploration of resonance properties in chiral perturbation theory with explicit U_A(1) anomaly

Details Exploration of resonance properties in chiral perturbation theory with explicit U_A(1) anomaly Exploration of resonance properties in chiral perturbation theory with explicit U_A(1) anomaly

2011-08-30

arxiv.org/abs/1108.5865v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 3 figures. Proceedings of XIV International Conference on Hadron Spectroscopy (Hadron2011), 13-17 June 2011, Munich,

Scientific paper

We study the resonance properties within chiral perturbation theory by explicitly taking into account the U_A(1) anomaly effect. This assures we have the appropriate degrees of freedom of low energy QCD in the large Nc limit. We calculate the various resonance properties, such as mass, width and residues, for the physical case, i.e. Nc=3. Then we extrapolate the values of Nc to study the trajectories of resonance poles.

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