Event patterns extracted from anisotropic spectra of charged particles produced in Pb-Pb collisions at 2.76 TeV

TL;DR

This paper analyzes event patterns in Pb-Pb collisions at 2.76 TeV using a combination of QCD-based and thermal models to describe particle spectra and flow, visualizing the kinetic freeze-out conditions.

Contribution

It introduces a hybrid modeling approach combining inverse power-law, Erlang, and Gaussian functions to describe different aspects of particle production and flow in heavy-ion collisions.

Findings

Successful description of transverse momentum spectra using combined models.

Visualization of event patterns at kinetic freeze-out in 3D spaces.

Enhanced understanding of soft and hard process contributions in Pb-Pb collisions.

Abstract

Event patterns extracted from anisotropic spectra of charged particles produced in lead-lead collisions at 2.76 TeV are investigated. We use an inverse power-law resulted from the QCD calculus to describe the transverse momentum spectrum in the hard scattering process, and a revised Erlang distribution resulted from a multisource thermal model to describe the transverse momentum spectrum and anisotropic flow in the soft excitation process. The pseudorapidity distribution is described by a three-Gaussian function which is a revision of the Landau hydrodynamic model. Thus, the event patterns at the kinetic freeze-out are displayed by the scatter plots of the considered particles in the three-dimensional velocity, momentum, and rapidity spaces.