A light front quark-diquark model for the nucleons
Tanmay Maji, Dipankar Chakrabarti
TL;DR
This paper introduces a light front quark-diquark model for nucleons based on AdS/QCD that accurately predicts various parton distribution functions and related observables, aligning well with experimental data.
Contribution
It develops a novel light front quark-diquark model for nucleons using AdS/QCD, consistent with key QCD relations and phenomenological data.
Findings
Reproduces proton unpolarized PDF scale evolution
Predicts helicity and transversity distributions matching data
Agrees with experimental axial and tensor charges
Abstract
We present a quark-diquark model for the nucleons where the light front wave functions are constructed from the soft-wall AdS/QCD prediction. The model is consistent with quark counting rule and Drell-Yan-West relation. The model reproduces the scale evolution of unpolarized PDF of proton for a wide range of energy scale. Helicity and transversity distributions for the proton predicted in this model agree with phenomenological fits. The axial and tensor charges are also shown to agree with the experimental data. The model can be used to evaluate distributions like GPDS, TMDs etc. and their scale evolutions.
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