Zobrazeno 1 - 10
of 17
pro vyhledávání: '"de Araújo, W. R. B."'
In the present work we study the effect of the scalar spin coupling of constituent quarks on the nucleon electroweak properties by introducing a valence light-front wave function with two momentum scales. By comparing the results obtained with the on
Externí odkaz:
http://arxiv.org/abs/2201.10338
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 quark-meson coupling model. The same in-medium quark properties are use
Externí odkaz:
http://arxiv.org/abs/1707.00168
Publikováno v:
Int.J.Mod.Phys. A18 (2003) 5767-5780
The neutron charge radius is studied within a light-front model with different spin coupling schemes and wave functions. The cancellation of the contributions from the Foldy term and Dirac form factor to the neutron charge form factor is verified for
Externí odkaz:
http://arxiv.org/abs/hep-ph/0305120
Publikováno v:
Nucl.Phys.A694:351-371,2001
We investigate the effect of different relativistic spin couplings of constituent quarks on nucleon electroweak properties. Within each quark spin coupling scheme the correlations between static electroweak observables are found to be independent of
Externí odkaz:
http://arxiv.org/abs/nucl-th/0007055
Publikováno v:
Phys.Lett.B478:86-93,2000
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 to the null-plane, such that t
Externí odkaz:
http://arxiv.org/abs/nucl-th/9911016
Publikováno v:
J.Phys.G25:1589-1592,1999
We compare the Bakamjian-Thomas (BT) formulation of relativistic few-body systems with light front field theories that maintain closer contact with Feynman diagrams. We find that Feynman diagrams distinguish Melosh rotations and other kinematical qua
Externí odkaz:
http://arxiv.org/abs/hep-ph/9904307
The proton is formulated as a relativistic system of three constituent quarks interacting via a zero-range two-body force in the null-plane. The covariance of the null-plane Faddeev-like equation under kinematical front-form boosts is discussed. A si
Externí odkaz:
http://arxiv.org/abs/hep-ph/9806507
Publikováno v:
European Physical Journal A -- Hadrons & Nuclei. Aug2006, Vol. 29 Issue 2, p227-234. 8p. 1 Diagram, 1 Chart, 3 Graphs.
Akademický článek
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Publikováno v:
Hadron Physics 2002: Topics on the Structure & Interaction of Hadronic Systems - Proceedings of the VIII International Workshop; 2003, p235-238, 4p