Thermalization component model of multiplicity distributions of charged hadrons at BNL($E^{lab}_{NN}=2-11.6GeV/c$), the CERN($E^{lab}_{NN}=20-200GeV/c$), and the BNL ($\sqrt{s_{NN}}=19.6-200 GeV$)

TL;DR

This paper introduces a Thermalization Component Model to analyze charged hadron multiplicity distributions at various energies, highlighting the limitations of the collective flow model at RHIC and emphasizing the role of thermalization in particle production.

Contribution

The paper presents a new Thermalization Component Model based on collective flow to better understand multiplicity distributions at RHIC energies, addressing previous model failures.

Findings

Collective flow model works at lower energies but fails at RHIC.

Thermalization region correlates with phase space in particle production.

Thermalization contributions vary with energy and centrality at RHIC.

Abstract

We find that collective flow model which can successfully analyze charged particle distributions at AGS and lower SPS (less than 20Gev/n). but fails to analyze that of at RHIC. The tails of distribution of charged particle at RHIC has a jump from the collective flow model calculation as the energy increases. Thermalization Component Model is presented based on collective flow to study the multiplicity distributions at RHIC in this paper. It is realized that the region of phase space of collective flow can reflect that of thermalization region. By comparing the contributions of particle productions from thermalization region at different energies and different centralities, we can deepen our study on the feature of collective movement at RHIC. Keywords: Thermalization, Thermalization component model