Abstract
It is demonstrated that the elastic diffractive scattering of nucleons at collision energies higher than 540 GeV and transferred momenta lower than 2 GeV, including the Coulomb-nuclear interference region, can be described in the framework of a very simple Regge-eikonal model where the eikonal is just a sum of two supercritical Regge pole terms. The predictive value of the proposed approximation is verified.
Highlights
During the last several decades, perturbative quantum chromodynamics confirmed its usefulness many times as a powerful theoretical tool in the sector of high energies and high transferred momenta of strongly interacting particles
To quantitatively describe the elastic diffractive scattering (EDS) of nucleons at high values of the collision energy and low values of the transferred momentum, we have to use phenomenological models which are not based on any analytic approximations within QCD
The aim of this paper is to demonstrate the predictive value and reliability of the two-Pomeron eikonal approximation proposed earlier in [6]
Summary
During the last several decades, perturbative quantum chromodynamics (pQCD) confirmed its usefulness many times as a powerful theoretical tool in the sector of high energies and high transferred momenta of strongly interacting particles. To quantitatively describe the elastic diffractive scattering (EDS) of nucleons at high values of the collision energy and low values of the transferred momentum, we have to use phenomenological models which are not based on any analytic approximations within QCD. In 2011, many hadron diffraction models nicely described the available experimental data on the proton-(anti)proton EDS in the energy range from the ISR to the Tevatron (with the collision energy increasing tens of times) but failed to reproduce the behavior of the pp angular distribution in the region of the diffraction dip and nonforward peak at the LHC [1]. The fraction of EDS events in the total number of events at high-energy hadron colliders is so significant (∼25% at the LHC) that we still need to develop reliable phenomenological approaches which could help properly interpret the results of the measurements in the high-energy hadron diffraction region. It will be done via application to the new elastic scattering data sets produced recently by the TOTEM Collaboration [7]
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