Study of u and d quark form factors in light front wave function with N2LO approximation

2016 ◽  
Vol 52 (4) ◽  
Author(s):  
Mohammad Reza Shojaei
Keyword(s):  
Wave Function ◽  
Form Factors ◽  
Light Front

Unpolarized and polarized densities based on a light-front quark–diquark model

2017 ◽  
Vol 32 (17) ◽  
pp. 1750097 ◽  
Author(s):  
Negin Sattary Nikkhoo ◽  
Mohammad Reza Shojaei
Keyword(s):  
Wave Function ◽  
Form Factors ◽  
Light Front ◽  
Electromagnetic Form Factors ◽  
De Sitter ◽  
Diquark Model ◽  
Soft Wall ◽  
Initial Scale

In this paper, we calculate the proton and neutron unpolarized and transversely polarized densities. We use the light-front wave function (LFWF), which at an initial scale is constrained by the soft-wall anti-de Sitter (AdS) QCD model, for calculating the Dirac and Pauli form factors which transverse densities are in terms of these form factors. Also, we use these form factors for calculating the flavor separated results for the proton and neutron electromagnetic form factors and calculate u and d quark unpolarized and transversely polarized densities. Finally, we compare our results with other previous parametrizations.

scholarly journals Applications of AdS/CFT Duality to QCD

2006 ◽  
Vol 21 (04) ◽  
pp. 762-768 ◽  
Author(s):  
Stanley J. Brodsky ◽  
Guy F. de Téramond
Keyword(s):  
Scattering Amplitudes ◽  
Quantum Chromodynamics ◽  
Power Law ◽  
Mass Parameter ◽  
Light Quark ◽  
Form Factors ◽  
Light Front ◽  
Baryon Spectrum ◽  
Conformal Theory ◽  
Counting Rules

Even though quantum chromodynamics is a broken conformal theory, the AdS/CFT correspondence has led to important insights into the properties of QCD. For example, as shown by Polchinski and Strassler, dimensional counting rules for the power-law falloff of hadron scattering amplitudes follow from dual holographic models with conformal behavior at short distances and confinement at large distances. We find that one also obtains a remarkable representation of the entire light-quark meson and baryon spectrum, including all orbital excitations, based on only one mass parameter. We also show how hadron light-front wavefunctions and hadron form factors in both the space-like and time-like regions can be predicted.

scholarly journals Mesonic tensor form factors with the light front quark model

2001 ◽  
Vol 64 (11) ◽  
Author(s):  
C. Q. Geng ◽  
C. W. Hwang ◽  
C. C. Lih ◽  
W. M. Zhang
Keyword(s):  
Quark Model ◽  
Form Factors ◽  
Light Front ◽  
Tensor Form

scholarly journals Frame dependence of transition form factors in light-front dynamics

2019 ◽  
Vol 100 (3) ◽  
Author(s):  
Meijian Li ◽  
Yang Li ◽  
Pieter Maris ◽  
James P. Vary
Keyword(s):  
Form Factors ◽  
Light Front ◽  
Transition Form ◽  
Frame Dependence ◽  
Front Dynamics
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