Feynman scaling violation on baryon spectra in pp collisions at LHC and cosmic ray energies

TL;DR

This paper investigates Feynman scaling violation in baryon spectra at LHC and cosmic ray energies, attributing it to baryon charge diffusion and increased Pomeron cuts, with predictions from the Quark-Gluon String Model.

Contribution

It introduces a new mechanism for Feynman scaling violation based on baryon charge diffusion and quantifies effects using the Quark-Gluon String Model at high energies.

Findings

Baryon/antibaryon yield asymmetry observed in high energy collisions.

Feynman scaling violation increases with energy due to baryon charge diffusion.

Predictions relevant for cosmic ray physics at ultra-high energies.

Abstract

A significant asymmetry in baryon/antibaryon yields in the central region of high energy collisions is observed when the initial state has non-zero baryon charge. This asymmetry is connected with the possibility of baryon charge diffusion in rapidity space. Such a diffusion should decrease the baryon charge in the fragmentation region and translate into the corresponding decrease of the multiplicity of leading baryons. As a result, a new mechanism for Feynman scaling violation in the fragmentation region is obtained. Another numerically more significant reason for the Feynman scaling violation comes from the fact that the average number of cutted Pomerons increases with initial energy. We present the quantitative predictions of the Quark-Gluon String Model (QGSM) for the Feynman scaling violation at LHC energies and at even higher energies that can be important for cosmic ray physics.