183 citations · 3.8k across the 109 of their papers we have counts for
27 papers · 1 filter
Excited light baryons from quark-gluon-level calculations
J. Segovia, C. Chen, Z. -F. Cui +2
The task of mapping and explaining the spectrum of baryons and the structure of these states in terms of quarks and gluons is a longstanding challenge in hadron physics, which is l…
Form factors for the Nucleon-to-Roper electromagnetic transition at large-
José Rodríguez-Quintero, Daniele Binosi, Chen Chen +3
We report on a recent calculation of all Roper-related electromagnetic transtions form factors, covering the range of energies that next-to-come planned experiments are expected to…
Structure of the nucleon and its first radial excitation
Jorge Segovia
A Poincaré-covariant continuum approach to the three valence-quark bound-state problem in quantum field theory is used to perform a detailed analysis of the nucleon's ground and fi…
Transition form factors: ,
Ya Lu, Chen Chen, Zhu-Fang Cui +4
Electroproduction form factors describing the transitions are computed using a fully-dynamical diquark-quark approximation to the Poincaré-covar…
Masses of ground-state mesons and baryons, including those with heavy quarks
Pei-Lin Yin, Chen Chen, Gastao Krein +3
Using a confining, symmetry-preserving regularisation of a vectorvector contact interaction, we compute the spectra of ground-state pseudoscalar and vector meso…
Spectrum and structure of octet and decuplet baryons and their positive-parity excitations
Chen Chen, Gastao Krein, Craig D. Roberts +2
A continuum approach to the three valence-quark bound-state problem in quantum field theory, employing parametrisations of the necessary kernel elements, is used to compute the spe…
Nucleon Parton Distribution Amplitude: A scalar diquark picture
Cédric Mezrag, Jorge Segovia, Minghui Ding +2
We report progress on the development of Perturbative Integral Representation Ansätze to compute the nucleon Faddeev Wave function, using an explicit quark-diquark picture. Our for…
Nucleon-to-Roper electromagnetic transition form factors at large-
Chen Chen, Ya Lu, Daniele Binosi +3
High-precision nucleon-resonance electroproduction data on a large kinematic domain of energy and momentum transfer have proven crucial in revealing novel features of strong intera…
Valence-quark structure N* resonances from DSEs
Jorge Segovia
We present a unified Quantum Chromodynamics (QCD)-based description of elastic and transition electromagnetic form factors involving the nucleon and its resonances. We compare pred…
Nucleon viewed as a Borromean Bound-State
Jorge Segovia, Cédric Mezrag, Lei Chang +1
We explain how the emergent phenomenon of dynamical chiral symmetry breaking ensures that Poincaré covariant analyses of the three valence-quark scattering problem in continuum qua…
Light-meson masses in an unquenched quark model
Xiaoyun Chen, Jialun Ping, Craig D. Roberts +1
We perform a coupled-channels calculation of the masses of light mesons with the quantum numbers , , by including and components in a…
Parton distribution amplitudes: revealing diquarks in the proton and Roper resonance
Cedric Mezrag, Jorge Segovia, Lei Chang +1
We present the first quantum field theory calculation of the pointwise behaviour of the leading-twist parton distribution amplitudes (PDAs) of the proton and its lightest radial ex…
Structure of the nucleon's low-lying excitations
Chen Chen, Bruno El-Bennich, Craig D. Roberts +3
A continuum approach to the three valence-quark bound-state problem in quantum field theory is used to perform a comparative study of the four lightest bary…
Parity partners in the baryon resonance spectrum
Ya Lu, Chen Chen, Craig D. Roberts +3
We describe a calculation of the spectrum of flavour-SU(3) octet and decuplet baryons, their parity partners, and the radial excitations of these systems, made using a symmetry-pre…
Flavour decomposition of electromagnetic transition form factors of nucleon resonances
Jorge Segovia, Craig D. Roberts
In Poincaré-covariant continuum treatments of the three valence-quark bound-state problem, the force behind dynamical chiral symmetry breaking also generates nonpointlike, interact…
Dissecting nucleon transition electromagnetic form factors
Jorge Segovia, Craig D. Roberts
In Poincaré-covariant continuum treatments of the three valence-quark bound-state problem, the force behind dynamical chiral symmetry breaking also generates nonpointlike, interact…
Baryons and the Borromeo
Craig D. Roberts, Jorge Segovia
The kernels in the tangible matter of our everyday experience are composed of light quarks. At least, they are light classically; but they don't remain light. Dynamical effects wit…
Electrocouplings in Dyson-Schwinger Equations
Jorge Segovia
A symmetry preserving framework for the study of continuum Quantum Chromodynamics (QCD) is obtained from a truncated solution of the QCD equations of motion or QCD's Dyson-Schwinge…
Elastic and Transition Form Factors in DSEs
Jorge Segovia
A symmetry preserving framework for the study of continuum Quantum Chromodynamics (QCD) is obtained from a truncated solution of the QCD equations of motion or QCD's Dyson-Schwinge…
Contact-interaction Faddeev equation and, inter alia, proton tensor charges
Shu-Sheng Xu, Chen Chen, Ian C. Cloet +3
A confining, symmetry-preserving, Dyson-Schwinger equation treatment of a vector-vector contact interaction is used to formulate Faddeev equations for the nucleon and Delta-baryon…
Strong diquark correlations inside the proton
Jorge Segovia
Quantum Chromodynamics is thought to be the relativistic quantum field theory that describes the strong interaction of the Standard Model. This interaction produces mesons but it i…
Understanding the nucleon as a Borromean bound-state
Jorge Segovia, Craig D. Roberts, Sebastian M. Schmidt
Analyses of the three valence-quark bound-state problem in relativistic quantum field theory predict that the nucleon may be understood primarily as a Borromean bound-state, in whi…
Completing the picture of the Roper resonance
Jorge Segovia, Bruno El-Bennich, Eduardo Rojas +4
We employ a continuum approach to the three valence-quark bound-state problem in relativistic quantum field theory to predict a range of properties of the proton's radial excitatio…
Nucleon and elastic and transition form factors
Jorge Segovia, Ian C. Cloet, Craig D. Roberts +1
We compute nucleon and Delta elastic and transition form factors, and compare predictions made using a framework built upon a Faddeev equation kernel and interaction vertices that…