A three component model for hadron $p_{\rm T}$-spectra in pp and Pb-Pb collisions at the LHC

TL;DR

This paper introduces a three-component model combining hydrodynamics and power-law terms to accurately fit hadron transverse momentum spectra in proton-proton and lead-lead collisions at the LHC across various energies and centralities.

Contribution

The paper presents a novel three-component model that improves the fitting of hadron $p_T$ spectra in different collision systems and energies at the LHC.

Findings

Model fits experimental data well for all particle types.

Applicable to a wide range of collision energies and centralities.

Describes spectra from pions to charmonia effectively.

Abstract

A three component model, consisting of the hydrodynamical blast-wave term and two power-law terms, is proposed for an improved fitting of the hadron spectra measured at midrapidity and for arbitrary transverse momenta ($p_\textrm{T}$) in pp and heavy-ion collisions of different centralities at the LHC. The model describes well the available experimental data for all considered particles from pions to charmonia in pp at $\sqrt{s}=$ 2.76, 5.02, 7, 8 and 13 TeV and in Pb-Pb at $\sqrt{s_\mathrm{NN}}=$ 2.76 and 5.02 TeV.