The Proton Gluon Distribution from the Color Dipole Picture

2022/06/12 by G. R. Boroun, Boroun, G. R., M. Kuroda +3
Physics and Astronomy · #Particle physics theoretical and experimental studies #High-Energy Particle Collisions Research #Quantum Chromodynamics and Particle Interactions

paper · pdf · doi:10.48550/arxiv.2206.05672

Abstract

Employing the representation of the experimental data on deep inelastic electron-proton scattering (DIS) in the color-dipole picture (CDP), we determine the gluon distribution of the proton at small Bjorken x. At sufficiently large momentum transfer, Q², the extracted gluon distribution fulfills the standard evolution equation for the proton structure function. For low values of Q², e.g. for Q² = 1.9 \rm GeV², the evolution equation for the proton structure function is violated. The standard procedure of adopting a low-Q² starting scale for the extraction of the gluon density is questionable and requires further investigations.

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