Generalized parton distributions and transverse densities in a light-front quark–diquark model for the nucleons

The European Physical Journal C

Dipankar Chakrabarti¹  Chandan Mondal¹ 

[1] Department of Physics, Indian Institute of Technology Kanpur, 208016, Kanpur, India;

关键词: Form Factor;    Electromagnetic Form Factor;    Deeply Virtual Compton Scattering;    Nucleon Form Factor;    Virtual Compton Scattering;   

DOI  :  10.1140/epjc/s10052-015-3486-6

来源: Springer

【 摘 要 】

We present a study of the generalized parton distributions (GPDs) for the quarks in a proton in both momentum and position spaces using the light-front wave functions (LFWFs) of a quark–diquark model for the nucleon predicted by the soft-wall model of AdS/QCD. The results are compared with the soft-wall AdS/QCD model of proton GPDs for zero skewness. We also calculate the GPDs for nonzero skewness. We observe that the GPDs have a diffraction pattern in longitudinal position space, as seen before in other models. Then we present a comparative study of the nucleon charge and anomalous magnetization densities in the transverse plane. Flavor decompositions of the form factors and transverse densities are also discussed.

【 授权许可】

CC BY