Eur. Phys. J. A (2005) 24: 137-147
https://doi.org/10.1140/epja/i2004-10127-4

Elastic scattering via quark structure of nucleons

Physics Department, Faculty of Science, Cairo University, Giza, Egypt

^* e-mail: ali@mailer.eun.eg

Received: 21 July 2004
Accepted: 16 January 2005
Published online: 25 February 2005

Abstract

In the framework of the Glauber multiple-scattering theory, the elastic collisions of proton-proton (pp) at the center-of-mass energies = 23.5, 30.7, 44.7, and 52.8 GeV and alpha-proton (αp) at = 88 and 89 GeV are analyzed by considering the quark structure of their constituents. The differential cross-section containing the full multiple-scattering series between their quarks is calculated using Gaussian forms for the quark density and quark-quark (QQ) scattering amplitudes. The results obtained from the quark model and the conventional nucleon model are compared with the experimental data. The comparison shows that the nucleon model reproduces the experimental data more satisfactorily than the quark model, and both approaches have limited success in describing the data at such energies. The agreement with the experimental data is improved by the inclusion of the phase variation.