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Abstract
We consider the effect of an energy-dependent dipole form factor in the high-energy behavior of the forward amplitude. The connection between the semihard parton-level dynamics and the hadron-hadron scattering is established by an eikonal QCD-based model. Our results for the proton-proton (pp) and antiproton-proton (̄pp) total cross sections, $\\sigma^{pp,\\bar{p}p}_{tot}(s)$, obtained using the CTEQ6L1 parton distribution function, are consistent with the recent data from the TOTEM experiment.
Highlights
The total cross section σtot(s) is a fundamental quantity in collisions of strongly interacting particles
In this work we explore the non-perturbative dynamics of QCD in order to describe, in both pp and pp channels, the total cross sections σtpopt,pp(s) and the ratios of the real to imaginary part of the forward scattering amplitude, ρpp,pp(s)
This work is organized as follows: we introduce our QCD-based model where the onset of the dominance of semihard partons is managed by the dynamical gluon mass
Summary
The total cross section σtot(s) is a fundamental quantity in collisions of strongly interacting particles. At present one of the main theoretical approaches for the description of σtot is the QCD-inspired formalism [1,2,3,4] In this approach the energy dependence of the total cross section is obtained from QCD via an eikonal formulation. In our calculations we introduce an energy-dependent dipole form factor which represents the overlap density for the partons at impact parameter b. The behavior of these forward quantities is derived from the QCD parton model using standard parton-parton elementary processes and an updated set of gluon distribution, namely the CTEQ6L1 set.
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