123 citations · 661 across the 34 of their papers we have counts for
29 papers · 1 filter
Nuclear matter and proton parton distributions in a light-front Hamiltonian framework
Xiaoyi Wu, Sreeraj Nair, Satvir Kaur +5
We develop a light-front Hamiltonian formulation of symmetric nuclear matter within the quark-meson coupling model, using Basis Light-Front Quantization to solve the in-medium nucl…
Baryon Bethe-Salpeter Equation in Minkowski-Space QCD
Satvir Kaur, Sreeraj Nair, Chandan Mondal +4
We study the three-quark ladder Bethe--Salpeter equation in Minkowski-space QCD in the light-cone gauge. Using the quasi-potential expansion, we project the baryon equation ont…
Ward-Takahashi identity in the light-front formalism for a bound state of fermions
Deepesh Bhamre, J. P. B. C. de Melo
We investigate the Ward-Takahashi identity at one-loop in the light-front (LF) formalism for a bound state of fermions. We consider a spinless bound state made up of two fermions i…
Pion off-shell electromagnetic form factors: data extraction and model analysis
Ho-Meoyng Choi, T. Frederico, Chueng-Ryong Ji +1
We investigate the pion electromagnetic half off-shell form factors, which parametrize the matrix element of the charged pion electromagnetic current with one leg off-mass-shell an…
Spin-1 particles and perturbative QCD
J. P. B. C. de Melo, T. Frederico, Chueng -R. Ji
Due to the angular condition in the light-front dynamics (LFD), the extraction of the electromagnetic form factors for spin-1 particles can be uniquely determined taking into accou…
In-Medium Electromagnetic Form Factor with a Symmetric Vertex in a Light Front Approach
George H. S. Yabusaki, J. P. B. C. de Melo, Wayne de Paula +2
Using the light-front kaon wave function based on a Bethe-Salpeter amplitude model for the quark-antiquark bound state, we study the Electromagnetic Form Factor (EMFF) of the kaon…
Study of the in-medium nucleon electromagnetic form factors using a light-front nucleon wave function combined with the quark-meson coupling model
W. R. B. de Aráujo, J. P. B. C. de Melo, K. Tsushima
We study the nucleon electromagnetic (EM) form factors in symmetric nuclear matter as well as in vacuum within a light-front approach using the in-medium inputs calculated by the q…
In-medium rho-meson properties in a light-front approach
J. P. B. C. de Melo, K. Tsushima
Properties of \r{ho}-meson in symmetric nuclear matter are investigated within a light-front constituent quark model (LFCQM), using the in-medium input calculated by the quark-meso…
Pion Electromagnetic Form Factor at Lower and Higher Momentum Transfer
J. P. B. C. de Melo, Rômulo Moreira Moita, Kazuo Tsushima
The pion electromagnetic form factor is calculated at lower and higher momentum transfer in order to explore constituent quark models and the differences among those models. In par…
In-Medium Pion Valence Distributions in a Light-Front Model
J. P. B. C de Melo, K. Tsushima, I. Ahmed
Pion valence distributions in nuclear medium and vacuum are studied in a light-front constituent quark model. The in-medium input for studying the pion properties is calculated by…
Parton Distribution in Pseudoscalar Mesons with a Light-Front Constituent Quark Model
J. P. B. C. de Melo, Isthiaq Ahmed, Kazuo Tsushima
We compute the distribution amplitudes of the pion and kaon in the light-front constituent quark model with the symmetric quark-bound state vertex function. In the calculation we e…
Pion in the Medium with a Light-Front Model
J. P. B. C. de Melo, Kazuo Tsushima, Tobias Frederico
The pion properties in symmetric nuclear matter are investigated with the Quark-Meson Coupling (QMC) Model plus the light-front constituent quark model~(LFCQM). The LFCQM has been…
Pseudoscalar mesons with symmetric bound state vertex functions on the light front
George H. S. Yabusaki, Ishtiaq Ahmed, M. Ali Paracha +2
We study the electromagnetic form factors, decay constants and charge radii of the pion and kaon within the framework of light-front field theory formalism where we use an ansatz f…
Insights into the quark-gluon vertex from lattice QCD and meson spectroscopy
E. Rojas, B. El-Bennich, J. P. B. C. De Melo +1
By comparing successful quark-gluon vertex interaction models with the corresponding interaction extracted from lattice-QCD data on the quark's propagator, we identify common quali…
Pion structure in the nuclear medium
J. P. B. C. de Melo, K. Tsushima, Bruno El-Bennich +2
Using the light-front pion wave function based on a Bethe-Salpeter amplitude model, we study the properties of the pion in symmetric nuclear matter. The pion model we adopt is well…
Light-Front projection of spin-1 electromagnetic current and zero-modes
J. P. B. C. de Melo, T. Frederico
The issue of the contribution of zero-modes to the light-front projection of the electromagnetic current of phenomenological models of vector particles vertices is addressed in the…
Eletroweak Form Factors in the Light-Front for Spin-1 Particles
J. P. B. C. de Melo, T. Frederico
The contribution of the light-front valence wave function to the electromagnetic current of spin-1 composite particles is not enough to warranty the proper transformation of the cu…
Light-Front Model of Transition Form-Factors in Heavy Meson Decay
J. P. B. C. de Melo, T. Frederico
Electroweak transition form factors of heavy meson decays are important ingredients in the extraction of the Cabibbo-Kobayashi-Maskawa (CKM) matrix elements from experimental data.…
Light-front quark distributions in the nucleon and nucleon electromagnetic form factors
E. Pace, J. P. B. C. de Melo, T. Frederico +2
Longitudinal and transverse quark momentum distributions in the nucleon are calculated from a phenomenological quark-nucleon vertex function obtained through an investigation of th…
Electromagnetic form factors of the nucleon in spacelike and timelike regions
J. P. B. C. de Melo, T. Frederico, E. Pace +2
An approach for a unified description of the nucleon electromagnetic form factors in spacelike and timelike regions is presented. The main ingredients of our model are: a Mand…
Pole Approximation for the pion eletromagnetic form factor within light-front dynamics
J. P. B. C. de Melo, J. S. Veiga, T. Frederico +2
We carefully investigate the reliability of the propagator Pole Approximation, i.e, the approximation of retaining only the propagator in the evaluation of the Mandelstam covariant…
A light-front Quark Model for the electromagnetic form factor of the pion
J. P. B. C. de Melo, T. Frederico, E. Pace +1
In this contribution, an approach for a unified description of the pion electromagnetic form factor, in the space- and time-like regions, within a constituent quark model on the li…
Spin-1 Particle in the Light-Front Approach
J. P. B. C. de Melo, T. Frederico
The electromagnetic current of spin-1 composite particles does not transform properly under rotations if only the valence contribution is considered in the light-front model. In pa…
Ground State Masses and Biding Energies of the Nucleon, Hyperon and Heavy Baryons in a Light-Front Model
E. F. Suisso, J. P. B. C. de Melo, T. Frederico
The ground state masses and binding energies of the nucleon, , , are studied within a constituent quark QCD-inspired light-front model. The light-front Faddeev…