Renormalization group equations in resonance chiral theory

Details Renormalization group equations in resonance chiral theory Renormalization group equations in resonance chiral theory

2009-05-22

arxiv.org/abs/0905.3676v2

Phys.Lett.B681:100-104,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 pages, 3 figures. Final version as published. References added. Extended explanations. The interrelation between the IR fixe

Scientific paper

10.1016/j.physletb.2009.09.044

The use of the equations of motion and meson field redefinitions allows the development of a simplified resonance chiral theory lagrangian: terms including resonance fields and a large number of derivatives can be reduced into corresponding O(p2) resonance operators, containing the lowest possible number of derivatives. This is shown by means of the explicit computation of the pion vector form-factor up to next-to-leading order in 1/Nc. The study of the renormalization group equations for the corresponding couplings demonstrates the existence of an infrared fixed point in the resonance theory. The possibility of developing a perturbative 1/Nc expansion in the slow running region around the fixed point is shown here.

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