Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2001-03-22
Nucl.Phys. A697 (2002) 767-782
Physics
High Energy Physics
High Energy Physics - Phenomenology
15 pages, 5 figures. Reduced version to be published in Nuc. Phys. A. Conclusions unchanged
Scientific paper
10.1016/S0375-9474(01)01256-8
The logarithmic slope of diffractive structure function is a potential observable to separate the hard and soft contributions in diffraction, allowing to disentangle the QCD dynamics. In this paper we extend our previous analyzes and calculate the diffractive logarithmic slope for three current approaches in the literature: (i) the Bartels-Wusthoff model, based on perturbative QCD, (ii) the CKMT model, based on Regge theory and (iii) the Golec Biernat - Wusthoff model which assumes that the saturation phenomena is present in the HERA kinematic region. We analyze the transition region of small to large momentum transfer and verify that future experimental results on the diffractive logarithmic slope could discriminate between these approaches.
Gay Ducati M. B.
Goncalves Victor P.
Machado Magno V. T.
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