Extended Longitudinal Scaling: direct evidence of saturation

TL;DR

This paper provides direct evidence of saturation in high-energy multiparticle production, demonstrating that the phenomenon of Extended Longitudinal Scaling is a manifestation of saturation effects similar to those in the Color Glass Condensate model.

Contribution

It establishes a link between Extended Longitudinal Scaling and saturation phenomena, offering experimental evidence supporting theoretical saturation models.

Findings

Observation of energy-independent particle production region

Increase of rapidity region with energy

Evidence supporting saturation as underlying mechanism

Abstract

Multiparticle production of charged particles at high energies exhibit the phenomenon of Limiting Fragmentation. Furthermore, the region in rapidity over which the production of particles appears to be independent of energy, increases with energy. It is argued that this phenomenon, known as Extended Longitudinal Scaling, is a direct manifestation of some kind of saturation, akin to that in the Color Glass Condensate picture of particle production.