80 citations · 735 across the 39 of their papers we have counts for
32 papers · 1 filter
Real poles with opposite-sign residues in the non-perturbative quark propagator
R. Alkofer, M. N. Ferreira, A. S. Miramontes +2
We investigate the analytic structure of the quark propagator in the Landau gauge by dynamically coupling the standard gap equation to the non-perturbative quark-gluon vertex. Empl…
Quark-gluon vertex in the complex plane
M. N. Ferreira, A. S. Miramontes, J. M. Morgado +1
In the present work we explore for the first time the general structure and properties of the nonperturbative quark-gluon vertex in the complex plane. Specifically, we focus on the…
Light mesons in the symmetric-vertex approximation
M. N. Ferreira, A. S. Miramontes, J. M. Morgado +1
We compute the spectrum of light mesons, composed by up, down, and strange quarks, using a symmetry-preserving approximation that permits the inclusion of fully-dressed quark-gluon…
Pions reloaded
M. N. Ferreira, A. S. Miramontes, J. M. Morgado +2
We present a novel version of the pion Bethe-Salpeter equation in the chiral limit, solved using as ingredients state-of-the-art QCD correlation functions. The constraints imposed…
Pion physics with dressed quark-gluon vertices
Mauricio N. Ferreira, Angel S. Miramontes, Jose M. Morgado +2
Recently, a theoretical framework was set up in [1], which allows for the symmetry-preserving inclusion of full quark-gluon vertices in the description of the meson dynamics. In th…
Physics of the gluon mass gap
Mauricio N. Ferreira, Joannis Papavassiliou, Jan M. Pawlowski +1
It has long been known that the gluon propagator in Landau-gauge QCD exhibits a mass gap; and its emergence has been ascribed to the action of the Schwinger mechanism in the gauge…
Gluon mass scale through the Schwinger mechanism
M. N. Ferreira, J. Papavassiliou
It has long been argued that the action of the Schwinger mechanism in the gauge sector of Quantum Chromodynamics leads to the generation of a gluon mass scale. Within this scenario…
Infrared properties of the quark-gluon vertex in general kinematics
A. C. Aguilar, M. N. Ferreira, G. T. Linhares +2
In the present work we determine the eight form factors of the transversely-projected quark-gluon vertex in general kinematics, in the context of Landau-gauge QCD with two degenera…
Nonperturbative four-gluon vertex in soft kinematics
A. C. Aguilar, F. De Soto, M. N. Ferreira +4
We present a nonperturbative study of the form factor associated with the projection of the full four-gluon vertex on its classical tensor, for a set of kinematics with one vanishi…
Nonlinear Schwinger mechanism in QCD, and Fredholm alternatives theorem
M. N. Ferreira, J. Papavassiliou
We present a novel implementation of the Schwinger mechanism in QCD, which fixes uniquely the scale of the effective gluon mass and streamlines considerably the procedure of multip…
Four-gluon vertex in collinear kinematics
A. C. Aguilar, M. N. Ferreira, J. Papavassiliou +1
To date, the four-gluon vertex is the least explored component of the QCD Lagrangian, mainly due to the vast proliferation of Lorentz and color structures required for its descript…
Schwinger displacement of the quark-gluon vertex
A. C. Aguilar, M . N. Ferreira, D. Ibañez +1
The action of the Schwinger mechanism in pure Yang-Mills theories endows gluons with an effective mass, and, at the same time, induces a measurable displacement to the Ward identit…
Schwinger poles of the three-gluon vertex: symmetry and dynamics
A. C. Aguilar, M. N. Ferreira, B. M. Oliveira +2
The implementation of the Schwinger mechanism endows gluons with a nonperturbative mass through the formation of special massless poles in the fundamental QCD vertices; due to thei…
Planar degeneracy of the three-gluon vertex
A. C. Aguilar, M. N. Ferreira, J. Papavassiliou +1
We present a detailed exploration of certain outstanding features of the transversely-projected three-gluon vertex, using the corresponding Schwinger-Dyson equation in conjunction…
Gauge Sector Dynamics in QCD
M. N. Ferreira, J. Papavassiliou
The dynamics of the gauge sector of QCD give rise to nonperturbative phenomena that are crucial for the internal consistency of the theory; most notably, they account for the gener…
Schwinger mechanism for gluons from lattice QCD
A. C. Aguilar, F. De Soto, M. N. Ferreira +4
Continuum and lattice analyses have revealed the existence of a mass-scale in the gluon two-point Schwinger function. It has long been conjectured that this expresses the action of…
Schwinger-Dyson truncations in the all-soft limit: a case study
A. C. Aguilar, M. N. Ferreira, B. M. Oliveira +1
We study a special Schwinger-Dyson equation in the context of a pure SU(3) Yang-Mills theory, formulated in the background field method. Specifically, we consider the corresponding…
Lattice three-gluon vertex in extended kinematics: planar degeneracy
F. Pinto-Gómez, F. De Soto, M. N. Ferreira +2
We present novel results for the three-gluon vertex, obtained from an extensive quenched lattice simulation in the Landau gauge. The simulation evaluates the transversely projected…
Theory and phenomenology of the three-gluon vertex
J. Papavassiliou, A. C. Aguilar, M. N. Ferreira
The three-gluon vertex is a fundamental ingredient of the intricate QCD dynamics, being inextricably connected to key nonperturbative phenomena, such as the emergence of a mass sca…
Ghost dynamics from Schwinger-Dyson equations
M. N. Ferreira
We discuss the coupled dynamics of the ghost dressing function and the ghost-gluon vertex through the Schwinger-Dyson equations that they satisfy. In order to close the system of e…
Exploring smoking-gun signals of the Schwinger mechanism in QCD
A. C. Aguilar, M. N. Ferreira, J. Papavassiliou
In QCD, the Schwinger mechanism endows the gluons with an effective mass through the dynamical formation of massless bound-state poles that are longitudinally coupled. The presence…
Ghost dynamics in the soft gluon limit
A. C. Aguilar, C. O. Ambrósio, F. De Soto +4
We present a detailed study of the dynamics associated with the ghost sector of quenched QCD in the Landau gauge, where the relevant dynamical equations are supplemented with key i…
Infrared facets of the three-gluon vertex
A. C. Aguilar, F. De Soto, M. N. Ferreira +2
We present novel lattice results for the form factors of the quenched three-gluon vertex of QCD, in two special kinematic configurations that depend on a single momentum scale. We…
Gluon dynamics from an ordinary differential equation
A. C. Aguilar, M. N. Ferreira, J. Papavassiliou
We present a novel method for computing the nonperturbative kinetic term of the gluon propagator from an exactly solvable ordinary differential equation, whose origin is the fundam…