161 citations · 495 across the 9 of their papers we have counts for
9 papers
Symmetry Preserving Contact Interaction Approaches: An Overview of Meson and Diquark Form Factors
L. X. Gutiérrez-Guerrero, Roger José Hernández-Pinto
We present an updated overview of the symmetry preserving Contact Interaction model in hadronic physics, developed a little over a decade ago to describe the mass spectrum and inte…
First Radial Excitations of Baryons in a Contact Interaction: Mass Spectrum
L. X. Gutiérrez-Guerrero, Alfredo Raya, L. Albino +1
We compute masses of twenty positive parity first radial excitations of spin- and baryons composed of u,d,s,c and b quarks in a quark-diquark picture within a contact in…
Constructing Scalar-Photon Three Point Vertex in Massless Quenched Scalar QED
L. Albino Fernandez-Rangel, A. Bashir, L. X. Gutierrez-Guerrero +1
Non perturbative studies of Schwinger-Dyson equations (SDEs) require their infnite, coupled tower to be truncated in order to reduce them to a practically solvable set. In this con…
Local Gauge Transformation for the Quark Propagator in an SU(N) Gauge Theory
M. Jamil Aslam, A. Bashir, L. X. Gutierrez-Guerrero
In an SU(N) gauge field theory, the n-point Green functions, namely, propagators and vertices, transform under the simultaneous local gauge variations of the gluon vector potential…
On How the Scalar Propagator Transforms Covariantly in Spinless Quantum Electrodynamics
Yajaira Concha Sánchez, Laura Xiomara Gutiérrez Guerrero, Victor M. Villanueva-Sandoval +1
Gauge covariance properties of the scalar propagator in spinless/scalar quantum electrodynamics (SQED) are explored in the light of the corresponding Landau-Khalatnikov-Fradkin tra…
Vacuum Polarization and Dynamical Chiral Symmetry Breaking: Phase Diagram of QED with Four-Fermion Contact Interaction
F. Akram, A. Bashir, L. X. Gutierrez-Guerrero +4
We study chiral symmetry breaking for fundamental charged fermions coupled electromagnetically to photons with the inclusion of four-fermion contact self-interaction term. We emplo…
pi- and rho-mesons, and their diquark partners, from a contact interaction
H. L. L. Roberts, A. Bashir, L. X. Gutierrez-Guerrero +2
We present a unified Dyson-Schwinger equation treatment of static and electromagnetic properties of pseudoscalar and vector mesons, and scalar and axial-vector diquark correlations…
Abelian anomaly and neutral pion production
H. L. L. Roberts, C. D. Roberts, A. Bashir +2
We show that in fully-self-consistent treatments of the pion; namely, its static properties and elastic and transition form factors, the asymptotic limit of the product Q^2 G_{γ* γ…
Pion form factor from a contact interaction
L. X. Gutierrez-Guerrero, A. Bashir, I. C. Cloet +1
In a Poincare'-covariant vector-boson-exchange theory, the pion possesses components of pseudovector origin, which materially influence its observable properties. For a range of su…