Phenomenology of the <VVP> Green's function within the Resonance Chiral Theory

Details Phenomenology of the <VVP> Green's function within the Resonance Chiral Theory Phenomenology of the <VVP> Green's function within the Resonance Chiral Theory

2003-09-30

arxiv.org/abs/hep-ph/0309345v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 1 figure. Talk given at QCD 03: High-Energy Physics International Conference in Quantum Chromodynamics, Montpellier,

Scientific paper

10.1016/j.nuclphysbps.2004.04.16

We analyse the odd-intrinsic-parity effective Lagrangian of QCD valid for processes involving one pseudoscalar with two vector mesons described in terms of antisymmetric tensor fields. Substantial information on the odd-intrinsic-parity couplings is obtained by constructing the vector-vector-pseudoscalar Green's three-point function, at leading order in 1/N_C, and demanding that its short-distance behaviour matches the corresponding OPE result. The QCD constraints thus enforced allow us to predict the decay amplitude omega -> pi gamma, the O(p^6) corrections to pi -> gamma gamma and the slope parameter in pi -> gamma gamma^*.

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