Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1996-01-11
Physics
High Energy Physics
High Energy Physics - Phenomenology
13 pages Revtex + 5 figures as postscript
Scientific paper
The hadronic quark structure is investigated in the frame of high energy electron proton scattering. A phenomenological model based on the Born approximation is used to calculate the transition matrix element for the quark system forming the proton target. A potential of electromagnetic nature is assumed for the calculation of the multiple scattering of electron with the constituent valance quarks of the proton. It is found that the first two terms of the Born approximation are sufficient to describe the experimental data of differential cross section for the electron proton system only at low momentum transfer square. On the other hand, a two body scattering amplitude with a relevant form factor may give proper agreement extended to high momentum transfer square region. A harmonic oscillator wave function is used to reproduce the data of the experiment at low momentum transfer. This satisfies quietly the confinement condition of the quarks in the hadron system. However the data of the experiment at relatively high momentum transfer, show that hadronic quarks behave more freely and may be described by just a Coulomb wave function. PACS: 13.40.Fn , 25.40.Cm
Hassan Nabila Mohamed
Hussein Mohamed Tarek
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