Field redefinitions and renormalization group equations in resonance chiral theory

por Juan Jose Sanz Cillero (IFAE Barcelona)

jueves 11 jun. 2009 12:30 → 13:30 Europe/Madrid

Sala Reuniones Sotano (Edf. Institutos de Investigación)

The use of the equations of motion and meson field redefinitions allows the development of a resonance chiral theory lagrangian without resonance corrections from higher derivative operators. 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 studied.