243 citations · 1.6k across the 38 of their papers we have counts for
38 papers
Isospin-breaking in the scattering amplitude I: Effects due to the pion mass difference
Gilberto Colangelo, Martina Cottini, Jacobo Ruiz de Elvira
This is the first of a series of papers devoted to a detailed analysis of isospin-breaking effects in the scattering amplitude and the vector form factor of the pion. Isospin…
The anomalous magnetic moment of the muon in the Standard Model: an update
R. Aliberti, T. Aoyama, E. Balzani +232
We present the current Standard Model (SM) prediction for the muon anomalous magnetic moment, , updating the first White Paper (WP20) [1]. The pure QED and electroweak contrib…
Description of femtoscopic correlations with realistic pion-kaon interactions: the case
A. Canoa, M. Albaladejo, J. Nieves +3
In this work, we show how femtoscopic correlations, recently reported by ALICE collaboration in collisions, can be well described taking into account relativistic…
Effective Lagrangians and thermal resonances under extreme conditions
Andrea Vioque Rodríguez, Angel Gómez Nicola, Jacobo Ruiz de Elvira
We analyze various problems related to the physics of hadrons under extreme conditions of temperature and chemical potentials. On the one hand, we show that the thermal resonances…
On the role of isospin violation in the pion-nucleon -term
Martin Hoferichter, Jacobo Ruiz de Elvira, Bastian Kubis +1
In recent years, a persistent tension between phenomenological and lattice QCD determinations of the pion-nucleon -term has developed. In particular, lattice-QCD calcul…
The pion-kaon scattering amplitude and the and resonances at finite temperature
Angel Gómez Nicola, Jacobo Ruiz de Elvira, Andrea Vioque-Rodríguez
We perform a complete calculation of the pion-kaon scattering amplitude in Chiral Perturbation Theory at finite temperature, paying particular attention to the analytic structure o…
Note on the definitions of branching ratios of overlapping resonances
V. Burkert, V. Crede, E. Klempt +8
Branching ratios for the decay of hadrons with large width or near thresholds depend on their definition. We test different definitions and show that rather different branching rat…
Chiral Symmetry Restoration, Thermal Resonances and the symmetry
Angel Gómez Nicola, Jacobo Ruiz de Elvira, Andrea Vioque-Rodríguez
We discuss recent results regarding the interplay between chiral and symmetry restoration, both from the point of view of Ward Identities relating meson susceptibilities a…
Chiral extrapolation of hadronic vacuum polarization
Gilberto Colangelo, Martin Hoferichter, Bastian Kubis +2
We study the pion-mass dependence of the two-pion channel in the hadronic-vacuum-polarization (HVP) contribution to the anomalous magnetic moment of the muon , by u…
Light- and strange-quark mass dependence of the meson properties
R. Molina, J. Ruiz de Elvira
From an analysis of recent ()--phase-shift and pseudoscalar-meson decay-constant lattice data on two distinct chiral trajectories, where either the sum of the up, down a…
Chiral and restoration for the scalar/pseudoscalar meson nonets
A. Gómez Nicola, J. Ruiz de Elvira
We analyze the restoration pattern of the members of the scalar and pseudoscalar meson nonets under chiral and symmetries. For that purpose, we exploit QCD Ward Ide…
Recent advances on chiral partners and patterns
Angel Gómez Nicola, Jacobo Ruiz de Elvira, Silvia Ferreres-Solé +1
We review recent results on chiral and symmetry restoration in QCD. In particular, we discuss how Ward Identities allow one to derive g…
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…
Feynman-Hellmann theorem for resonances and the quest for QCD exotica
J. Ruiz de Elvira, U. -G. Meißner, A. Rusetsky +1
The generalization of the Feynman-Hellmann theorem for resonance states in quantum field theory is derived. On the basis of this theorem, a criterion is proposed to study the possi…
Extracting the sigma-term from low-energy pion-nucleon scattering
Jacobo Ruiz de Elvira, Martin Hoferichter, Bastian Kubis +1
We present an extraction of the pion-nucleon () scattering lengths from low-energy scattering, by fitting a representation based on Roy-Steiner equations to the low-energy…
Patterns and partners for chiral symmetry restoration
A. Gomez Nicola, J. Ruiz de Elvira
We present and analyze a new set of Ward Identities which shed light on the distinction between different patterns of chiral symmetry restoration in QCD, namely vs $O(4)\tim…
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 -…
Chiral Symmetry restoration from the hadronic regime
Angel Gomez Nicola, Santiago Cortes, John Morales +2
We discuss recent advances on QCD chiral symmetry restoration at finite temperature, within the theoretical framework of Effective Theories. Ward Identities are derived betw…
Reconciling threshold and subthreshold expansions for pion-nucleon scattering
D. Siemens, J. Ruiz de Elvira, E. Epelbaum +4
Heavy-baryon chiral perturbation theory (ChPT) at one loop fails in relating the pion-nucleon amplitude in the physical region and for subthreshold kinematics due to loop effects e…
On the pi pi continuum in the nucleon form factors and the proton radius puzzle
M. Hoferichter, B. Kubis, J. Ruiz de Elvira +2
We present an improved determination of the continuum contribution to the isovector spectral functions of the nucleon electromagnetic form factors. Our analysis includes the m…
On the uncertainty estimates of the -pole determination by Padé approximants
Irinel Caprini, Pere Masjuan, Jacobo Ruiz de Elvira +1
We discuss the determination of the (or ) resonance by analytic continuation through Padé approximants of the -scattering amplitude from the physical region to th…
Pseudoscalar susceptibilities and quark condensates: chiral restoration and lattice screening masses
A. Gomez Nicola, J. Ruiz de Elvira
We derive the formal Ward identities relating pseudoscalar susceptibilities and quark condensates in three-flavor QCD, including consistently the - sector and the a…
Remarks on the pion-nucleon sigma-term
Martin Hoferichter, Jacobo Ruiz de Elvira, Bastian Kubis +1
The pion-nucleon -term can be stringently constrained by the combination of analyticity, unitarity, and crossing symmetry with phenomenological information on the pion-nucleon s…
Roy-Steiner-equation analysis of pion-nucleon scattering
Martin Hoferichter, Jacobo Ruiz de Elvira, Bastian Kubis +1
We review the structure of Roy-Steiner equations for pion-nucleon scattering, the solution for the partial waves of the t-channel process , as well as the high-accu…