14 citations · 35 across the 22 of their papers we have counts for
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Experimental access to the gluonic origin of the proton mass
Zein-Eddine Meziani, Ismail Zahed
Most of the proton mass originates not from the Higgs mechanism but from the quantum structure of the QCD vacuum. The dominant contribution arises from the gluonic trace anomaly as…
Anomalies, Topology, and Hadron Structure in QCD
Ismail Zahed
Quantum Chromodynamics (QCD) provides a remarkable realization of how quantum effects reshape the symmetries of a classical field theory. The axial anomaly links chirality to gauge…
Faddeev description of baryons in two-dimensional QCD with . I. Chiral spectrum, isospin, and strangeness
Ismail Zahed, Haocheng Zhang
We develop a light-front Faddeev description of baryons in two-dimensional QCD at , in which an exact coupled-channel representation identifies the quark--diquark picture as…
Chiral Structure and Selection Rules in Light-Front Nucleon-Pentaquark Mixing
Fangcheng He, Edward Shuryak, Wan Wu +1
We present a light-front Hamiltonian analysis of nucleon-pentaquark mixing induced by - and -type transition operators in a fully Pauli-consistent five-quark basis. The penta…
Hybrid hadrons at rest and on the light front
Edward Shuryak, Ismail Zahed
We present a unified description of heavy hybrid hadrons based on a constituent-gluon picture embedded in the Born-Oppenheimer (BO) framework. In this approach, the gluonic excitat…
The Hadron-Parton Bridge, From the QCD Vacuum to Partons
Edward Shuryak, Ismail Zahed
Quantum Chromodynamics (QCD) exhibits complementary descriptions of hadrons: a rest-frame picture based on confinement, chiral symmetry breaking and interquark forces, and a high-e…
Pentaquarks on the light front, and their mixture with baryons
Nicholas Miesch, Edward Shuryak, Ismail Zahed
In previous papers we developed the light front formulation for Hamiltonians and wave functions (WFs) for mesons and baryons, with both confinement and chiral symmetry breaking. Fo…
The color force acting on a quark in the pion and nucleon
Wei-Yang Liu, Edward Shuryak, Ismail Zahed
In the Operator Product Expansion (OPE) of hard scattering amplitudes, the twist-3 operators describe local colored Lorentz forces acting on a quark, thereby providing a measure of…
Light S-wave pentaquarks on the light front
Fangcheng He, Edward Shuryak, Wan Wu +1
We construct an explicit basis set for pentaquark states on a regular 4-simplex, that diagonalizes the Hamiltonian for light pentaquarks with confinement on the light front (LF). T…
Pentaquarks made of light quarks and their admixture to baryons
Nicholas Miesch, Edward Shuryak, Ismail Zahed
This paper is a continuation of our studies of multiquark hadrons. The anti-symmetrization of their wavefunctions required by Fermi statistics is nontivial, as it mixes orbital, co…
D-shell mixing in light baryons and its effect on the orbital motion
Nicholas Miesch, Edward Shuryak, Ismail Zahed
The standard description of the nucleon in the non-relativistic quark model is an state without orbital motion. Yet, there are several indications from phenomenology that…
Tomography of the Rho meson in the QCD Instanton Vacuum: Transverse Momentum Dependent Parton Distribution Functions
Wei-Yang Liu, Ismail Zahed
We analyse the rho meson unpolarized and polarized transverse momentum dependent parton distribution functions (TMDPDFs) in the instanton liquid model (ILM). The corresponding TMDs…
Tomography of Pions and Kaons in the QCD Vacuum: Transverse Momentum Dependent Parton Distribution Functions
Wei-Yang Liu, Ismail Zahed
We evaluate the pion and kaon transverse momentum dependent parton distribution functions (TMDPDFs) in the instanton liquid model (ILM), a model of the QCD vacuum at low resolution…
Collins-Soper Kernel in the QCD Instanton Vacuum
Wei-Yang Liu, Ismail Zahed, Yong Zhao
We outline a general framework for evaluating the non-perturbative soft functions in the QCD instanton vacuum. In particular, from the soft function we derive the Collins-Soper (CS…
Nucleon electric dipole form factor in QCD vacuum
Wei-Yang Liu, Ismail Zahed
In the QCD vacuum, the nucleon form factors receive contributions from the underlying ensemble of topological pseudoparticles, which are sensitive to a finite vacuum angle . We…
Pion gravitational form factors in the QCD instanton vacuum II
Wei-Yang Liu, Edward Shuryak, Ismail Zahed
We revisit the hard QCD contributions to the pion gravitational form factors (GFFs), in terms of the twist-2,3 pion distribution amplitudes (DA), including novel semi-hard contribu…
Pion gravitational form factors in the QCD instanton vacuum I
Wei-Yang Liu, Edward Shuryak, Christian Weiss +1
The pion form factors of the QCD energy-momentum tensor (EMT) are studied in the instanton liquid model (ILM) of the QCD vacuum. In this approach the breaking of conformal symmetry…