Current correlators and form factors in the resonance region

Details Current correlators and form factors in the resonance region Current correlators and form factors in the resonance region

2008-10-20

arxiv.org/abs/0810.3592v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

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

Scientific paper

10.1016/j.nuclphysbps.2008.12.03

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}.

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