418 citations · 3.5k across the 61 of their papers we have counts for
60 papers · 1 filter
Global parametrizations of scattering with dispersive constraints: Beyond the S0 wave
J. R. Peláez, P. Rabán, J. Ruiz de Elvira
We provide new global parametrizations of scattering for the S2, P, D, F, and G partial waves up to at least 1.8 GeV, easy to implement for phenomenological use. With ea…
Dispersive amplitude and giant CP violation in B to three light-meson decays at LHCb
R. Alvarez Garrote, J. Cuervo, P. C. Magalhães +2
The LHCb collaboration has recently reported the largest CP violation effect from a single amplitude, as well as other giant CP asymmetries in several -meson decays into three c…
Dispersive and amplitudes from scattering data, threshold parameters and the lightest strange resonance or
J. R. Peláez, A. Rodas
We discuss the simultaneous dispersive analyses of and scattering data and the resonance. The unprecedented statistics of present and fu…
Global parameterization of scattering up to 2 GeV
J. R. Pelaez, A. Rodas, J. Ruiz de Elvira
We provide global parameterizations of scattering and partial waves up to roughly 2 GeV for phenomenological use. These parameterizations describe the output and unce…
scattering up to 1.47 GeV with hyperbolic dispersion relations
J. R. Pelaez, A. Rodas
In this work we provide a dispersive analysis of scattering. For this purpose we present a set of partial-wave hyperbolic dispersion relations using a fami…
Calculation of resonances from scattering
A. Rodas, J. R. Pelaez, J. Ruiz de Elvira
We present a determination of the mass, width and coupling of the strange resonances appearing in pion-kaon scattering below 1.8 GeV, namely the much debated or , t…
The non-ordinary Regge behavior of the K*0(800) or Kappa-meson versus the ordinary K*0(1430)
J. R. Pelaez, A. Rodas
The Regge trajectory of an elastic resonance can be calculated from dispersion theory, instead of fitted phenomenologically, using only its pole parameters as input. This also prov…
Strange resonance poles from scattering below 1.8 GeV
J. R. Peláez, A. Rodas, J. Ruiz de Elvira
In this work we present a determination of the mass, width and coupling of the resonances that appear in kaon-pion scattering below 1.8 GeV. These are: the much debated scalar -…
The pion-kaon scattering amplitude constrained with forward dispersion relations up to 1.6 GeV
J. R. Pelaez, A. Rodas
In this work we provide simple and precise parameterizations of the existing scattering data from threshold up to 1.6 GeV, which are constrained to satisfy forward dispersion…
From controversy to precision on the sigma meson: a review on the status of the non-ordinary resonance
J. R. Pelaez
The existence and properties of the sigma meson have been controversial for almost six decades, despite playing a central role in the spontaneous chiral symmetry of QCD or in the n…
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…
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…
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…
Present status of light flavoured scalar resonances
J. R. Pelaez
This talk is a brief account of recent developments on light scalar meson spectroscopy. I mostly focus on the major revision of the or meson in the Review of Particl…
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.…
Precise determination of the f0(500) and f0(980) parameters in dispersive analysis of the pipi data
R. Kaminski, R. Garcia-Martin, J. R. Pelaez +1
We review the use of new and precise dispersive equations, which also implement crossing symmetry, in order to shed further light on the long-standing puzzle in the parameters of t…
Scalar susceptibilities and four-quark condensates in the meson gas within Chiral Perturbation Theory
A. Gomez Nicola, J. R. Pelaez, J. Ruiz de Elvira
We analyze the properties of four-quark condensates and scalar susceptibilities in the meson gas, within finite temperature Chiral Perturbation Theory (ChPT). The breaking of the f…
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…
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…