Perturbative evolution in holographic soft-wall model

2015 ◽  
Vol 30 (11) ◽  
pp. 1550046 ◽  
Author(s):  
Majid Dehghani
Keyword(s):  
Sum Rules ◽  
Form Factors ◽  
Distribution Functions ◽  
Parton Distribution Functions ◽  
Wall Model ◽  
Hadronic Physics ◽  
Soft Wall Model ◽  
Qualitative Level ◽  
Soft Wall ◽  
Nucleon Form Factors

Generalized parton distribution functions (GPDs) describe different features of hadronic physics in a single framework. There are sum rules that relate them to phenomenologically interesting quantities. By means of GPDs calculated in the holographic soft-wall model, perturbative effects are entered into the formalism in an effective way. Using the DGLAP-like equations, GPDs are evolved to the next-to-leading order of approximation and then implications on nucleon form factors and their charge distributions will be discussed at a qualitative level.

Progress in the calculation of nucleon form factors and parton distribution functions

2003 ◽  
Vol 721 ◽  
pp. C915-C921 ◽  
Author(s):  
A.W. Thomas ◽  
J.D. Ashley ◽  
W. Detmold ◽  
D.B. Leinweber ◽  
W. Melnitchouk ◽  
...  
Keyword(s):  
Parton Distribution ◽  
Form Factors ◽  
Distribution Functions ◽  
Parton Distribution Functions ◽  
Nucleon Form Factors

scholarly journals Double parton correlations in mesons within AdS/QCD soft-wall models: a first comparison with lattice data

2020 ◽  
Vol 80 (7) ◽  
Author(s):  
Matteo Rinaldi
Keyword(s):  
Lattice Qcd ◽  
Parton Distribution ◽  
General Procedure ◽  
Form Factors ◽  
Distribution Functions ◽  
Lattice Data ◽  
Parton Distribution Functions ◽  
Model Calculations ◽  
Double Parton Scattering ◽  
Soft Wall

Abstract Double parton distribution functions (dPDFs), entering the double parton scattering (DPS) cross section, are unknown fundamental quantities encoding new interesting properties of hadrons. Here, the pion dPDFs are investigated within different holographic QCD quark models in order to access their basic features. Results of the calculations obtained within the AdS/QCD soft-wall approach, have been compared with predictions of lattice QCD evaluations of the pion two-current correlation functions. The present analysis confirms that double parton correlations, affecting dPDFs, are very important and not direct accessible from generalised parton distribution functions and electromagnetic form factors. The comparison between lattice data and quark model calculations unveils the relevance of the contributions of high partonic Fock states in the pion. Nevertheless, by using a complete general procedure, results of lattice QCD have been used, for the first time, to estimate the mean value of the so called $$\sigma _{eff}$$σeff, a relevant experimental observable for DPS processes. In addition, the results of the first calculations of the $$\rho $$ρ meson dPDFs are discussed in order to make predictions.

scholarly journals NUCLEON RESONANCES AND GPDS IN AdS/QCD

2014 ◽  
Vol 26 ◽  
pp. 1460066 ◽  
Author(s):  
ALFREDO VEGA ◽  
IVAN SCHMIDT ◽  
THOMAS GUTSCHE ◽  
VALERY E. LYUBOVITSKIJ
Keyword(s):  
Roper Resonance ◽  
Wall Model ◽  
Nucleon Resonances ◽  
Soft Wall Model ◽  
Nucleon Spectrum ◽  
Soft Wall

We discuss an holographic soft wall model to describe nucleon properties. We pay special attention to nucleon spectrum, GPDs in the skewness case for nucleons and electroproduction of the N (1440) Roper resonance in soft-wall AdS/QCD.

scholarly journals Extended Soft-wall Model for the QCD Phase Diagram

2017 ◽  
Vol 10 (3) ◽  
pp. 789
Author(s):  
R. Zöllner ◽  
F. Wunderlich ◽  
B. Kämpfer
Keyword(s):  
Phase Diagram ◽  
Wall Model ◽  
Qcd Phase Diagram ◽  
Soft Wall Model ◽  
Soft Wall

The contribution of valence quarks in the nucleon GE and GM

2019 ◽  
Vol 34 (27) ◽  
pp. 1950148
Author(s):  
Negin Sattary Nikkhoo ◽  
Mohammad Reza Shojaei
Keyword(s):  
Experimental Data ◽  
Angular Momentum ◽  
Form Factor ◽  
Total Angular Momentum ◽  
Form Factors ◽  
Distribution Functions ◽  
The Other ◽  
Parton Distribution Functions ◽  
Nucleon Electromagnetic Form Factor ◽  
Elastic Form

The goal of this paper is to extract the flavor decomposition of nucleon electromagnetic form factor using the modified Gaussian and extended Regge ansatzes in the GPDs. We consider the CJ15 and JR09 parton distribution functions for both of these ansatzes in calculating the nucleon elastic form factors. Our results are compared with experimental data in the range [Formula: see text] 4-momentum transfers. Also, we calculate the total angular momentum carried by quarks, the gravitational form factors, and the transverse gravitational density for quarks of the nucleon. In the end, our results are compared with the other studies.

scholarly journals Chiral phase transition in the soft-wall model of AdS/QCD

2016 ◽  
Vol 2016 (4) ◽  
pp. 1-30 ◽  
Author(s):  
Kaddour Chelabi ◽  
Zhen Fang ◽  
Mei Huang ◽  
Danning Li ◽  
Yue-Liang Wu
Keyword(s):  
Phase Transition ◽  
Wall Model ◽  
Chiral Phase ◽  
Chiral Phase Transition ◽  
Soft Wall Model ◽  
Soft Wall

scholarly journals Pseudoscalar mass spectrum in a soft-wall model of AdS/QCD

2011 ◽  
Vol 83 (1) ◽  
Author(s):  
Thomas M. Kelley ◽  
Sean P. Bartz ◽  
Joseph I. Kapusta
Keyword(s):  
Mass Spectrum ◽  
Wall Model ◽  
Soft Wall Model ◽  
Soft Wall
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