Rapidity and energy dependence of average transverse momentum and particle density in saturation models

TL;DR

This paper demonstrates that saturation models, specifically the colour glass condensate and string percolation, can accurately describe the rapidity and energy dependence of average transverse momentum and particle density across various collision types and energies, including predictions for the LHC.

Contribution

It introduces a combined approach using saturation models and evolution equations with energy-momentum conservation to describe particle production data across different collision systems and energies.

Findings

Accurate description of <P_T> and dn/dy across energies and collision types

Validation of saturation models against experimental data

Predictions for LHC collision outcomes

Abstract

Saturation models -- colour glass condensate and string percolation -- impose a strict relation between the average transverse momentum, <P_T>, and the rapidity particle densities, dn/dy. By combining this relation with an appropriate evolution equation for dn/dy, and imposing energy-momentum conservation, we obtain a fair description of data, for generic AB collisions (hadron-hadron, hadron-nucleus and nucleus-nucleus) at all rapidities and (high) energies. Predictions are given for the LHC.