Inclusive processes in the modified Quark-Gluon String Model
M. N. Sergeenko
TL;DR
The paper addresses the challenge of describing inclusive high-energy hadron production with a nonperturbative QCD framework that spans soft diffraction and hard scattering. It develops a modified Quark-Gluon String Model (QGSM) with an eikonal representation of the scattering amplitude and a two-gluon nonperturbative Pomeron, extracting invariant spectra from light-cone distributions and fragmentation functions. Key contributions include explicit expressions for total and inelastic cross sections, a treatment of diffraction dissociation, and a unified description of inclusive spectra across soft and semihard regimes using a topological 1/N expansion; the Landshoff–Nachtmann vacuum input fixes the Pomeron parameters. The results illustrate that the framework can describe elastic and inelastic processes at LHC energies and bridge Regge phenomenology with nonperturbative QCD, demonstrated by comparisons to Tevatron data and anticipated applicability to LHC phenomenology.
Abstract
Inclusive processes at high energies are studied in a non-perturbative approach in QCD using a modified Quark-Gluon String Model. Theoretical and experimental aspects of diffraction dissociation are discussed. In the calculations of cross sections, the parameters of complex nonlinear trajectories of Pomeranchuk and Reggeons are used. Particular attention is paid to elastic and inelastic processes at LHC energies.