From p+p to Pb+Pb Collisions: Wounded Nucleon versus Statistical Models

TL;DR

This paper compares the Wounded Nucleon Model and Statistical Model in describing hadron production across different collision systems, highlighting their similarities, differences, and the need for integrated models respecting conservation laws.

Contribution

It analyzes the size dependence of hadron production using various statistical formulations and discusses the necessity for models combining hydrodynamics with conservation laws.

Findings

Models show both similarities and differences in predictions.

Conservation laws significantly influence model outcomes.

A new class of models integrating hydrodynamics and conservation laws is needed.

Abstract

System size dependence of hadron production properties is discussed within the Wounded Nucleon Model and the Statistical Model in the grand canonical, canonical and micro-canonical formulations. Similarities and differences between predictions of the models related to the treatment of conservation laws are exposed. A need for models which would combine a hydrodynamical-like expansion with conservation laws obeyed in individual collisions is stressed.