Relativistic and retardation corrections to photon-nucleon absorption sum rules in the constituent-quark model

1996 ◽  
Vol 109 (4) ◽  
pp. 415-424
Author(s):  
M. De Sanctis
Keyword(s):  
Quark Model ◽  
Constituent Quark ◽  
Sum Rules ◽  
Constituent Quark Model

scholarly journals Generalized sum rules of the nucleon in the constituent quark model

2004 ◽  
Vol 70 (5) ◽  
Author(s):  
M. Gorchtein ◽  
D. Drechsel ◽  
M. M. Giannini ◽  
E. Santopinto ◽  
L. Tiator
Keyword(s):  
Quark Model ◽  
Constituent Quark ◽  
Sum Rules ◽  
Constituent Quark Model

scholarly journals THE ELECTRIC AND MAGNETIC FORM FACTORS OF THE NEUTRON

1993 ◽  
Vol 08 (22) ◽  
pp. 2135-2140 ◽  
Author(s):  
FELIX SCHLUMPF
Keyword(s):  
Wave Function ◽  
Vector Meson ◽  
Quark Model ◽  
Constituent Quark ◽  
Sum Rules ◽  
Form Factors ◽  
Constituent Quark Model ◽  
Specific Form ◽  
Vector Meson Dominance ◽  
Magnetic Form Factors

We derive the electric and magnetic form factors of the neutron in the framework of a relativistic constituent quark model. Our parameter free prediction agrees well with a recent, accurate measurement. The relativistic features of the model and the specific form of the wave function are essential for the result. Comparisons are made to other models based on vector meson dominance, perturbative QCD and QCD sum rules.

Generalized sum rules of the nucleon in the constituent quark model

2004 ◽  
pp. 77-79
Author(s):  
M. Gorchtein ◽  
D. Drechsel ◽  
M. Giannini ◽  
E. Santopinto
Keyword(s):  
Quark Model ◽  
Constituent Quark ◽  
Sum Rules ◽  
Constituent Quark Model

scholarly journals Generalized sum rules of the nucleon in the constituent quark model

2004 ◽  
Vol 19 (S1) ◽  
pp. 77-79 ◽  
Author(s):  
M. Gorchtein ◽  
D. Drechsel ◽  
M. Giannini ◽  
E. Santopinto
Keyword(s):  
Quark Model ◽  
Constituent Quark ◽  
Sum Rules ◽  
Constituent Quark Model

scholarly journals Low-lying configurations in a non-relativistic constituent quark model

2007 ◽  
Vol 34 (7) ◽  
pp. 1771-1782 ◽  
Author(s):  
W L Wang ◽  
F Huang ◽  
Z Y Zhang ◽  
Y W Yu ◽  
F Liu
Keyword(s):  
Quark Model ◽  
Constituent Quark ◽  
Constituent Quark Model

THE NLO QCD CALCULATION OF SEA QUARK DISTRIBUTIONS IN THE CORGI APPROACH, BASED ON THE CONSTITUENT QUARK MODEL

2007 ◽  
Vol 22 (24) ◽  
pp. 4519-4535 ◽  
Author(s):  
A. MIRJALILI ◽  
K. KESHAVARZIAN
Keyword(s):  
Quark Model ◽  
Mellin Transform ◽  
Constituent Quark ◽  
Constituent Quark Model ◽  
Standard Approach ◽  
Unknown Parameters ◽  
Electron Positron Annihilation ◽  
Electron Positron ◽  
Physical Scale ◽  
Good Agreement

Sea quark distributions in the NLO approximation, based on the phenomenological valon model or constituent quark model are analyzed. We use the parametrized inverse Mellin transform technique to perform a direct fit with available experimental data and obtain the unknown parameters of the distributions. We try to extend the calculation to the NLO approximation for the singlet and nonsinglet cases in DIS phenomena. We do also the same calculation for electron–positron annihilation. The resulting sea distributions are effectively independent of the process used. The approach of complete RG improvement (CORGI) is employed and the results are compared with the standard approach of perturbative QCD in the [Formula: see text] scheme with a physical scale. The comparisons with data are in good agreement. As is expected, the results in the CORGI approach indicate a better agreement to the data than the NLO calculation in the standard approach.

scholarly journals An overview of the hypercentral constituent quark model

2003 ◽  
Vol 50 (2) ◽  
pp. 263-272 ◽  
Author(s):  
M.M Giannini ◽  
E Santopinto ◽  
A Vassallo
Keyword(s):  
Quark Model ◽  
Constituent Quark ◽  
Constituent Quark Model
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