Application of chiral resonance Lagrangian theories to the muon g-2
Abstract
We think that phenomenological resonance Lagrangian models, constrained by global fits from low energy hadron reaction data, can help to improve muon g-2 predictions. The main issue are those contributions which cannot be calculated by perturbative means: the hadronic vacuum polarization (HVP) effects and the hadronic light--by--light (HLbL) scattering contribution. I review recent progress in the evaluation of the HVP contribution within the broken Hidden Local Symmetry (HLS) framework, worked out in collaboration with M. Benayoun, P. David and L. DelBuono. Our HLS driven estimate reads amu (LO had)=(688.60+\-4.24) 10-10 and we find amu (theory)= (11 659 177.65 +/- 5.76) 10-10.
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