101 citations · 328 across the 17 of their papers we have counts for
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Dispersive calculation of complex Regge trajectories for the lightest resonances
J. A. Carrasco, J. Nebreda, J. R. Pelaez +1
We apply a recently developed dispersive formalism to calculate the Regge trajectories of the and mesons. Trajectories are calculated, not fitted to a fami…
Regge trajectories of ordinary and non-ordinary mesons from their scattering poles
J. Nebreda, J. A. Carrasco, J. T. Londergan +2
Our results on obtaining the Regge trajectory of a resonance from its pole in a scattering process and from analytic constraints in the complex angular momentum plane are presented…
The non-ordinary Regge behavior of the meson
J. R. Peláez, J. T. Londergan, J. Nebreda +1
We review how the Regge trajectory of an elastic resonance can be obtained just from its pole position and coupling, by means of a dispersive formalism. This allows to deal correct…
Non-ordinary nature of the f_0(500) resonance from its Regge trajectory
J. Nebreda, J. T. Londergan, J. R. Pelaez +1
We report our results on how to obtain the Regge trajectory of a resonance from its pole in a scattering process by imposing analytic constraints in the complex angular momentum pl…
Regge trajectory of the f_0(500) resonance from a dispersive connection to its pole
J. Nebreda, J. T. Londergan, J. R. Pelaez +1
We report here our results on how to obtain the Regge trajectory of a resonance from its pole in a scattering process by imposing analytic constraints in the complex angular moment…
Identification of non-ordinary mesons from the dispersive connection between their poles and their Regge trajectories: the f0(500) resonance
J. T. Londergan, J. Nebreda, J. R. Pelaez +1
We show how the Regge trajectory of a resonance can be obtained from its pole in a scattering process and analytic constraints in the complex angular momentum plane. The method is…
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…
Chiral extrapolation of pion-pion scattering phase shifts within standard and unitarized Chiral Perturbation Theory
J. Nebreda, J. R. Pelaez, G. Rios
We calculate the pion-pion elastic scattering phase shifts for pion masses from the chiral limit to values of interest for lattice studies. At low energies, we use the standard Chi…
Dependence on the quark masses of elastic phase shifts and light resonances within standard and unitarized Chiral Perturbation Theory
J. Nebreda, J. R. Pelaez
We study the dependence of the pion-pion scattering phase shifts on the light quark mass in both standard and unitarized SU(2) Chiral Perturbation Theory (ChPT) to one and two loop…
Properties of light resonances from unitarized Chiral perturbation theory: Nc behavior and quark mass dependence
J. R. Pelaez, J. Nebreda, G. Rios
We review the unitarization of Chiral Perturbation Theory with dispersion relations and how it describes meson-meson scattering data, generating light resonances whose mass, width…
Unitarized Chiral Perturbation Theory and the meson spectrum
Jose R. Pelaez, C. Hanhart, J. Nebreda +1
In this talk we briefly review how the unitarization of Chiral Perturbation Theory with dispersion relations can successfully describe the meson-meson scattering data and generate…
f_0(600), kappa(800), rho(770) and K*(892), quark mass dependence from unitarized SU(3) Chiral Perturbation Theory
J. Nebreda, J. R. Pelaez
We study the strange and non-strange quark mass dependence of the parameters of the f_0(600), kappa(800), rho(770) and K*(892) resonances generated from elastic meson-meson scatter…
Strange and non-strange quark mass dependence of elastic light resonances from SU(3) Unitarized Chiral Perturbation Theory to one loop
J. Nebreda, J. R. Pelaez.
We study the light quark mass dependence of the f_0(600), kappa(800), rho(770) and K*(892) resonance parameters generated from elastic meson-meson scattering using unitarized one-l…