Current correlators and form factors in the resonance region

Abstract

Within Resonance Chiral Theory and in the context of QCD current correlators at next-to-leading order in 1/N(C), we have analyzed the two-body form factors which include resonances as a final state . The short-distance constraints have been studied. One of the main motivations is the estimation of the chiral low-energy constants at subleading order, that is, keeping full control of the renormalization scale dependence. As an application we show the resonance estimation of some coupling, L(10)(mu_0)=(-4.4 \pm 0.9)10^{-3} and C(87)(mu_0)=(3.1 \pm 1.1)10^{-5}.

Talk given at the 14th International Quantum Chromodynamics Conference, 7-12th July (2008), Montpellier (France)

References in corpus (9)

• Towards a consistent estimate of the chiral low-energy constants
• <VAP> Green Function in the Resonance Region
• Finite Energy Chiral Sum Rules and Tau Spectral Functions
• $\pi \to l\nu \gamma$ Form Factors at Two-loop
• Quantum Loops in the Resonance Chiral Theory: The Vector Form Factor
• Form-factors and current correlators: chiral couplings L_10(mu) and C_87(mu) at NLO in 1/N(C)
• A rational approximation to <VV-AA> and its O(p^6) low-energy constant
• One-loop Renormalization of Resonance Chiral Theory: Scalar and Pseudoscalar Resonances
• An example of resonance saturation at one loop