418 citations · 3.5k across the 61 of their papers we have counts for
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The nature of the lightest scalar meson, its Nc behaviour and semi-local duality
J. R. Peláez, M. R. Pennington, J. Ruiz de Elvira +1
One-loop unitarized Chiral Perturbation Theory (UChPT) calculations, suggest a different Nc behaviour for the sigma or f0(600) and rho(770) mesons: while the rho meson becomes narr…
Precise determination of the f0(600) and f0(980) pole parameters from a dispersive data analysis
R. Garcia-Martin, R. Kaminski, J. R. Pelaez +1
We use our latest dispersive analysis of pion-pion scattering data and the very recent Kl4 experimental results to obtain the mass, width and couplings of the two lightest scalar-i…
Enhanced non-quark-antiquark and non-glueball Nc behavior of light scalar mesons
J. Nebreda, J. R. Pelaez, G. Rios
We show that the latest and very precise dispersive data analyses require a large and very unnat- ural fine-tuning of the 1/Nc expansion at Nc = 3 if the f_0(600) and K(800) light…
The pion-pion scattering amplitude. IV: Improved analysis with once subtracted Roy-like equations up to 1100 MeV
R. García- Martín, R. Kamiński, J. R. Peláez +2
We improve our description of pion-pion scattering data by imposing additional requirements to our previous fits, in the form of once-subtracted Roy-like equations, while extending…