New method of accounting for interference contributions within a multipheriperal model

TL;DR

This paper introduces a novel method for calculating interference contributions in proton scattering within a scalar model, enabling analysis of high multiplicity events and aligning with experimental data.

Contribution

The authors propose a grouping method for interference terms that allows efficient calculation of their total contributions in high multiplicity proton scattering.

Findings

Calculated interference contributions up to multiplicity n~50 at 50 GeV

Model predictions agree qualitatively with experimental total cross-sections

Explained the energy dependence of the inclusive rapidity distribution as an interference effect

Abstract

We consider an inelastic scattering of protons within the simplest real scalar model $\phi^3$ (phi-cubed). Although this model is being studied for a very long time, the problem of accounting for the interference contributions for all the possible particle multiplicities observed in experiment is not solved yet. We propose the method which is based on grouping of the interference contributions into sets in such a way that the sum of all interference contributions of each particular set can be calculated with Laplace's method. This approach allowed us to calculate all the interference contributions to the cross-sections for multiplicities up to $ n\sim 50 $ at the energy $ \sqrt{s} \sim 50$ GeV. The obtained models of the energy dependence of total $pp$ scattering cross-section and the inclusive rapidity distribution are in qualitative agreement with the experiment. We also consider the well known effect of the energy dependence of the shape of inclusive rapidity distribution, and propose an explanation of this dependence and consider it exactly as the interference effect.