2003/03/05 by Firooz Arash, F. Arash, Ali N. Khorramian +1 · 1 citation
Physics and Astronomy · #Constituent quark #Formalism (music) #Hadron #High-Energy Particle Collisions Research #Lambda #Nucleon #Order (exchange) #Particle physics #Particle physics theoretical and experimental studies #Physics #Pion #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quantum mechanics #Quark #Quark model #Quarkonium #Structure function #hep-ph
paper · pdf · doi:10.1103/physrevc.67.045201
published as Phys.Rev. C67 (2003) 045201 · 32 pages,10 figures, Accepted to publish in Phys. Rev. C
arxiv created 2003/03/05 · openalex publication_date 2003/04/28 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We utilize the existing next-to-leading-order (NLO) formalism to calculate the partonic structure of a constituent quark. The structure of any hadron can be obtained thereafter using a convolution method. Such a procedure is used to generate the structure functions of protons and pions in NLO, neglecting certain corrections to \ensuremathΛQCD. It is shown that while the constituent quark structure is generated purely perturbatively and accounts for the most part of the hadronic structure, there is a few percent contribution coming from the nonperturbative sector in the hadronic structure. This contribution plays the key role in explaining the SU(2) symmetry breaking of the nucleon sea and the observed violation of the Gottfried sum rule. These effects are calculated. We obtained an excellent agreement with the experimental data in a wide range of x=[10^\ensuremath-6,1] and Q2=[0.5,5000]GeV2 for the proton structure function. We have also calculated pion structure and compared it with the existing data. Again, the model calculations agree rather well with the data from experiment.