207 citations · 867 across the 23 of their papers we have counts for
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Remarks on pole trajectories for resonances
C. Hanhart, J. R. Pelaez, G. Rios
We discuss in general terms pole trajectories of resonances coupling to a continuum channel as some strength parameter is varied. It is demonstrated that, regardless the underlying…
Determination of Chiral Perturbarion Theory low energy constants from a precise description of pi-pi scattering threshold parameters
Guillermo Rios, Jenifer Nebreda, Jose R. Pelaez
We report on our determination of the values of the one and two loop low energy constants appearing in the Chiral Perturbation Theory calculation of the pi-pi scattering amplitude.…
Enhanced non-quark-antiquark and non-gluebal N_c behavior of light scalar mesons
Guillermo Rios, Jenifer Nebreda, Jose R. Pelaez
We report our results on the nature of the lightest scalar resonances, where we show that a quark-antiquark or glueball interpretation of the scalars f_0(600) and K^*_0(800) requir…
Determination of SU(2) Chiral Perturbation Theory low energy constants from a precise description of pion-pion scattering threshold parameters
J. Nebreda, J. R. Pelaez, G. Rios
We determine the values of the one- and two-loop low energy constants appearing in the SU(2) Chiral Perturbation Theory calculation of pion-pion scattering. For this we use a recen…
Mass dependence of pion-pion phase shifts within standard and unitarized ChPT versus Lattice results
J. Nebreda, J. R. Pelaez, G. Rios
We report on our recent results in the study of the chiral extrapolation of the phase-shifts in elastic pion-pion scattering, using both standard and unitarized ChPT to one and two…
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…