Buscar
Mostrando ítems 1-10 de 46
Electromagnetic form factor of the pion in the space- and time-like regions within the front-form dynamics
(2004-02-12)
The pion electromagnetic form factor is calculated in the space- and time-like regions from -10 (GeV/c)2 up to 10 (GeV/c)2, within a front-form model. The dressed photon vertex where a photon decays in a quark-antiquark ...
Relativistic quark spin coupling effects in the nucleon electromagnetic form factors
(2000-04-06)
We investigate the effect of different forms of relativistic spin coupling of constituent quarks in the nucleon electromagnetic form factors. The four-dimensional integrations in the two-loop Feynman diagram are reduced ...
Ideas of four-fermion operators in electromagnetic form factor calculations
(2013-05-07)
Four-fermion operators have been used in the past to link the quark-exchange processes in the interaction of hadrons with the effective meson-exchange amplitudes. In this paper, we apply the similar idea of a Fierz ...
Elastic scattering and the proton form factor
(World Scientific Publ Co Pte Ltd, 2006-12-28)
We use the QCD pomeron model proposed by Landshoff and Nachtmann to compute the differential and the total cross-sections for pp scattering in order to discuss a QCD-based approach to the proton form factor. This model is ...
The pion electromagnetic form factor in a QCD-inspired model
(Springer, 2005-06-01)
We present detailed numerical results for the pion space-like electromagnetic form factor obtained within a recently proposed model of the pion electromagnetic current in a confining light-front QCD-inspired model. The ...
The kaon electromagnetic form factor in the light-front formalism
(Interperiodica, 2005-01-01)
Numerical calculations are performed and compared to the experimental data for the electromagnetic form factor of the kaon, extracted from both components of the electromagnetic current, J(+) and J(-), with a pseudo-scalar ...
The kaon electromagnetic form factor in the light-front formalism
(2005-12-27)
Numerical calculations are performed and compared to the experimental data for the electromagnetic form factor of the kaon, extracted from both components of the electromagnetic current, J+ and J-, with a pseudo-scalar ...
Bound state structure and electromagnetic form factor beyond the ladder approximation
(2017-03-01)
We investigate the response of the bound state structure of a two-boson system, within a Yukawa model with a scalar boson exchange, to the inclusion of the cross-ladder contribution to the ladder kernel of the Bethe-Salpeter ...
Quark-antiquark correlation in the pion
(1997-09-22)
The electromagnetic tensor for inclusive electron scattering off the pion Wμν for momentum transfers such that q+ = 0, (q+ = q0 + q3) is shown to obey a sum-rule for the component W++. From this sum-rule, one can define ...
Electromagnetic hadron form factors and higher Fock components
(Elsevier B.V., 2007-02-01)
Investigation of the spacelike and timelike electromagnetic form factors of hadrons, within a relativistic microscopical model characterized by a small set of hypothesis, could shed light on the components of hadron states ...